diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..61fbf5b
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,4 @@
+# https://help.github.com/en/github/administering-a-repository/customizing-how-changed-files-appear-on-github
+
+**/Cargo.nix linguist-generated=true
+
diff --git a/Cargo.nix b/Cargo.nix
new file mode 100644
index 0000000..0adb792
--- /dev/null
+++ b/Cargo.nix
@@ -0,0 +1,1122 @@
+# This file was @generated by cargo2nix 0.8.2.
+# It is not intended to be manually edited.
+
+{
+  release ? true,
+  rootFeatures ? [
+    "rmob/default"
+  ],
+  rustPackages,
+  buildRustPackages,
+  hostPlatform,
+  mkRustCrate,
+  rustLib,
+  lib,
+}:
+let
+  inherit (rustLib) fetchCratesIo fetchCrateLocal fetchCrateGit fetchCrateAlternativeRegistry expandFeatures decideProfile genDrvsByProfile;
+  profilesByName = {
+  };
+  rootFeatures' = expandFeatures rootFeatures;
+  overridableMkRustCrate = f:
+    let
+      drvs = genDrvsByProfile profilesByName ({ profile, profileName }: mkRustCrate ({ inherit release profile; } // (f profileName)));
+    in { compileMode ? null, profileName ? decideProfile compileMode release }:
+      let drv = drvs.${profileName}; in if compileMode == null then drv else drv.override { inherit compileMode; };
+in
+{
+  cargo2nixVersion = "0.8.2";
+  workspace = {
+    rmob = rustPackages.unknown.rmob."0.1.0";
+  };
+  "registry+https://github.com/rust-lang/crates.io-index".ansi_term."0.11.0" = overridableMkRustCrate (profileName: rec {
+    name = "ansi_term";
+    version = "0.11.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"; };
+    dependencies = {
+      ${ if hostPlatform.parsed.kernel.name == "windows" then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".argon2rs."0.2.5" = overridableMkRustCrate (profileName: rec {
+    name = "argon2rs";
+    version = "0.2.5";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "3f67b0b6a86dae6e67ff4ca2b6201396074996379fba2b92ff649126f37cb392"; };
+    dependencies = {
+      blake2_rfc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".blake2-rfc."0.2.18" { inherit profileName; };
+      scoped_threadpool = rustPackages."registry+https://github.com/rust-lang/crates.io-index".scoped_threadpool."0.1.9" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".arrayvec."0.4.10" = overridableMkRustCrate (profileName: rec {
+    name = "arrayvec";
+    version = "0.4.10";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "92c7fb76bc8826a8b33b4ee5bb07a247a81e76764ab4d55e8f73e3a4d8808c71"; };
+    dependencies = {
+      nodrop = rustPackages."registry+https://github.com/rust-lang/crates.io-index".nodrop."0.1.13" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".assert_cmd."0.11.0" = overridableMkRustCrate (profileName: rec {
+    name = "assert_cmd";
+    version = "0.11.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "7eaef71d143e8053e28166ea984712b71a5e5d7f26a885809eb829e0c8e4f051"; };
+    dependencies = {
+      escargot = rustPackages."registry+https://github.com/rust-lang/crates.io-index".escargot."0.4.0" { inherit profileName; };
+      predicates = rustPackages."registry+https://github.com/rust-lang/crates.io-index".predicates."1.0.0" { inherit profileName; };
+      predicates_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".predicates-core."1.0.0" { inherit profileName; };
+      predicates_tree = rustPackages."registry+https://github.com/rust-lang/crates.io-index".predicates-tree."1.0.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".atty."0.2.11" = overridableMkRustCrate (profileName: rec {
+    name = "atty";
+    version = "0.2.11";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"; };
+    dependencies = {
+      ${ if hostPlatform.isUnix then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "redox" then "termion" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".termion."1.5.1" { inherit profileName; };
+      ${ if hostPlatform.isWindows then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".autocfg."0.1.2" = overridableMkRustCrate (profileName: rec {
+    name = "autocfg";
+    version = "0.1.2";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "a6d640bee2da49f60a4068a7fae53acde8982514ab7bae8b8cea9e88cbcfd799"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".backtrace."0.3.14" = overridableMkRustCrate (profileName: rec {
+    name = "backtrace";
+    version = "0.3.14";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "cd5a90e2b463010cd0e0ce9a11d4a9d5d58d9f41d4a6ba3dcaf9e68b466e88b4"; };
+    features = builtins.concatLists [
+      [ "backtrace-sys" ]
+      [ "coresymbolication" ]
+      [ "dbghelp" ]
+      [ "default" ]
+      [ "dladdr" ]
+      [ "libbacktrace" ]
+      [ "libunwind" ]
+      [ "std" ]
+    ];
+    dependencies = {
+      ${ if hostPlatform.isUnix && !(hostPlatform.parsed.kernel.name == "fuchsia") && !(hostPlatform.parsed.kernel.name == "emscripten") && !(hostPlatform.parsed.kernel.name == "darwin") && !(hostPlatform.parsed.kernel.name == "ios") then "backtrace_sys" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".backtrace-sys."0.1.28" { inherit profileName; };
+      cfg_if = rustPackages."registry+https://github.com/rust-lang/crates.io-index".cfg-if."0.1.7" { inherit profileName; };
+      ${ if hostPlatform.isUnix || hostPlatform.parsed.abi.name == "sgx" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      rustc_demangle = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rustc-demangle."0.1.13" { inherit profileName; };
+      ${ if hostPlatform.isWindows then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+    buildDependencies = {
+      autocfg = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".autocfg."0.1.2" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".backtrace-sys."0.1.28" = overridableMkRustCrate (profileName: rec {
+    name = "backtrace-sys";
+    version = "0.1.28";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "797c830ac25ccc92a7f8a7b9862bde440715531514594a6154e3d4a54dd769b6"; };
+    dependencies = {
+      libc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+    };
+    buildDependencies = {
+      cc = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".cc."1.0.31" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".bitflags."1.0.4" = overridableMkRustCrate (profileName: rec {
+    name = "bitflags";
+    version = "1.0.4";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".blake2-rfc."0.2.18" = overridableMkRustCrate (profileName: rec {
+    name = "blake2-rfc";
+    version = "0.2.18";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "5d6d530bdd2d52966a6d03b7a964add7ae1a288d25214066fd4b600f0f796400"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "std" ]
+    ];
+    dependencies = {
+      arrayvec = rustPackages."registry+https://github.com/rust-lang/crates.io-index".arrayvec."0.4.10" { inherit profileName; };
+      constant_time_eq = rustPackages."registry+https://github.com/rust-lang/crates.io-index".constant_time_eq."0.1.3" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".cc."1.0.31" = overridableMkRustCrate (profileName: rec {
+    name = "cc";
+    version = "1.0.31";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "c9ce8bb087aacff865633f0bd5aeaed910fe2fe55b55f4739527f2e023a2e53d"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".cfg-if."0.1.7" = overridableMkRustCrate (profileName: rec {
+    name = "cfg-if";
+    version = "0.1.7";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "11d43355396e872eefb45ce6342e4374ed7bc2b3a502d1b28e36d6e23c05d1f4"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".clap."2.32.0" = overridableMkRustCrate (profileName: rec {
+    name = "clap";
+    version = "2.32.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"; };
+    features = builtins.concatLists [
+      [ "ansi_term" ]
+      [ "atty" ]
+      [ "color" ]
+      [ "default" ]
+      [ "strsim" ]
+      [ "suggestions" ]
+      [ "vec_map" ]
+    ];
+    dependencies = {
+      ${ if !hostPlatform.isWindows then "ansi_term" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".ansi_term."0.11.0" { inherit profileName; };
+      atty = rustPackages."registry+https://github.com/rust-lang/crates.io-index".atty."0.2.11" { inherit profileName; };
+      bitflags = rustPackages."registry+https://github.com/rust-lang/crates.io-index".bitflags."1.0.4" { inherit profileName; };
+      strsim = rustPackages."registry+https://github.com/rust-lang/crates.io-index".strsim."0.7.0" { inherit profileName; };
+      textwrap = rustPackages."registry+https://github.com/rust-lang/crates.io-index".textwrap."0.10.0" { inherit profileName; };
+      unicode_width = rustPackages."registry+https://github.com/rust-lang/crates.io-index".unicode-width."0.1.5" { inherit profileName; };
+      vec_map = rustPackages."registry+https://github.com/rust-lang/crates.io-index".vec_map."0.8.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".cloudabi."0.0.3" = overridableMkRustCrate (profileName: rec {
+    name = "cloudabi";
+    version = "0.0.3";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"; };
+    features = builtins.concatLists [
+      [ "bitflags" ]
+      [ "default" ]
+    ];
+    dependencies = {
+      bitflags = rustPackages."registry+https://github.com/rust-lang/crates.io-index".bitflags."1.0.4" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".constant_time_eq."0.1.3" = overridableMkRustCrate (profileName: rec {
+    name = "constant_time_eq";
+    version = "0.1.3";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "8ff012e225ce166d4422e0e78419d901719760f62ae2b7969ca6b564d1b54a9e"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".curl-sys."0.4.17" = overridableMkRustCrate (profileName: rec {
+    name = "curl-sys";
+    version = "0.4.17";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "7b8d8e51964f58c8053337fcef48e1c4608c7ee70c6f2e457674a97dda5a5828"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "openssl-sys" ]
+      [ "ssl" ]
+    ];
+    dependencies = {
+      libc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      libz_sys = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libz-sys."1.0.25" { inherit profileName; };
+      ${ if hostPlatform.isUnix && !(hostPlatform.parsed.kernel.name == "darwin") then "openssl_sys" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".openssl-sys."0.9.43" { inherit profileName; };
+      ${ if hostPlatform.isWindows then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+    buildDependencies = {
+      cc = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".cc."1.0.31" { profileName = "__noProfile"; };
+      pkg_config = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".pkg-config."0.3.14" { profileName = "__noProfile"; };
+      ${ if hostPlatform.parsed.abi.name == "msvc" then "vcpkg" else null } = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".vcpkg."0.2.6" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".difference."2.0.0" = overridableMkRustCrate (profileName: rec {
+    name = "difference";
+    version = "2.0.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "524cbf6897b527295dff137cec09ecf3a05f4fddffd7dfcd1585403449e74198"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".dirs."1.0.5" = overridableMkRustCrate (profileName: rec {
+    name = "dirs";
+    version = "1.0.5";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "3fd78930633bd1c6e35c4b42b1df7b0cbc6bc191146e512bb3bedf243fcc3901"; };
+    dependencies = {
+      ${ if hostPlatform.isUnix then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "redox" then "redox_users" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".redox_users."0.3.0" { inherit profileName; };
+      ${ if hostPlatform.isWindows then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".escargot."0.4.0" = overridableMkRustCrate (profileName: rec {
+    name = "escargot";
+    version = "0.4.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "ceb9adbf9874d5d028b5e4c5739d22b71988252b25c9c98fe7cf9738bee84597"; };
+    dependencies = {
+      lazy_static = rustPackages."registry+https://github.com/rust-lang/crates.io-index".lazy_static."1.3.0" { inherit profileName; };
+      log = rustPackages."registry+https://github.com/rust-lang/crates.io-index".log."0.4.6" { inherit profileName; };
+      serde = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde."1.0.89" { inherit profileName; };
+      serde_json = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde_json."1.0.39" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".failure."0.1.5" = overridableMkRustCrate (profileName: rec {
+    name = "failure";
+    version = "0.1.5";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"; };
+    features = builtins.concatLists [
+      [ "backtrace" ]
+      [ "default" ]
+      [ "derive" ]
+      [ "failure_derive" ]
+      [ "std" ]
+    ];
+    dependencies = {
+      backtrace = rustPackages."registry+https://github.com/rust-lang/crates.io-index".backtrace."0.3.14" { inherit profileName; };
+      failure_derive = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".failure_derive."0.1.5" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".failure_derive."0.1.5" = overridableMkRustCrate (profileName: rec {
+    name = "failure_derive";
+    version = "0.1.5";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"; };
+    dependencies = {
+      proc_macro2 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".proc-macro2."0.4.27" { inherit profileName; };
+      quote = rustPackages."registry+https://github.com/rust-lang/crates.io-index".quote."0.6.11" { inherit profileName; };
+      syn = rustPackages."registry+https://github.com/rust-lang/crates.io-index".syn."0.15.29" { inherit profileName; };
+      synstructure = rustPackages."registry+https://github.com/rust-lang/crates.io-index".synstructure."0.10.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".fuchsia-cprng."0.1.1" = overridableMkRustCrate (profileName: rec {
+    name = "fuchsia-cprng";
+    version = "0.1.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".git2."0.8.0" = overridableMkRustCrate (profileName: rec {
+    name = "git2";
+    version = "0.8.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "c7339329bfa14a00223244311560d11f8f489b453fb90092af97f267a6090ab0"; };
+    features = builtins.concatLists [
+      [ "curl" ]
+      [ "default" ]
+      [ "https" ]
+      [ "openssl-probe" ]
+      [ "openssl-sys" ]
+      [ "ssh" ]
+      [ "ssh_key_from_memory" ]
+    ];
+    dependencies = {
+      bitflags = rustPackages."registry+https://github.com/rust-lang/crates.io-index".bitflags."1.0.4" { inherit profileName; };
+      libc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      libgit2_sys = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libgit2-sys."0.7.11" { inherit profileName; };
+      log = rustPackages."registry+https://github.com/rust-lang/crates.io-index".log."0.4.6" { inherit profileName; };
+      ${ if hostPlatform.isUnix && !(hostPlatform.parsed.kernel.name == "darwin") then "openssl_probe" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".openssl-probe."0.1.2" { inherit profileName; };
+      ${ if hostPlatform.isUnix && !(hostPlatform.parsed.kernel.name == "darwin") then "openssl_sys" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".openssl-sys."0.9.43" { inherit profileName; };
+      url = rustPackages."registry+https://github.com/rust-lang/crates.io-index".url."1.7.2" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".heck."0.3.1" = overridableMkRustCrate (profileName: rec {
+    name = "heck";
+    version = "0.3.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"; };
+    dependencies = {
+      unicode_segmentation = rustPackages."registry+https://github.com/rust-lang/crates.io-index".unicode-segmentation."1.2.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".idna."0.1.5" = overridableMkRustCrate (profileName: rec {
+    name = "idna";
+    version = "0.1.5";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "38f09e0f0b1fb55fdee1f17470ad800da77af5186a1a76c026b679358b7e844e"; };
+    dependencies = {
+      matches = rustPackages."registry+https://github.com/rust-lang/crates.io-index".matches."0.1.8" { inherit profileName; };
+      unicode_bidi = rustPackages."registry+https://github.com/rust-lang/crates.io-index".unicode-bidi."0.3.4" { inherit profileName; };
+      unicode_normalization = rustPackages."registry+https://github.com/rust-lang/crates.io-index".unicode-normalization."0.1.8" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".itoa."0.4.3" = overridableMkRustCrate (profileName: rec {
+    name = "itoa";
+    version = "0.4.3";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "std" ]
+    ];
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".lazy_static."1.3.0" = overridableMkRustCrate (profileName: rec {
+    name = "lazy_static";
+    version = "1.3.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "bc5729f27f159ddd61f4df6228e827e86643d4d3e7c32183cb30a1c08f604a14"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" = overridableMkRustCrate (profileName: rec {
+    name = "libc";
+    version = "0.2.50";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "aab692d7759f5cd8c859e169db98ae5b52c924add2af5fbbca11d12fefb567c1"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "use_std" ]
+    ];
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".libgit2-sys."0.7.11" = overridableMkRustCrate (profileName: rec {
+    name = "libgit2-sys";
+    version = "0.7.11";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "48441cb35dc255da8ae72825689a95368bf510659ae1ad55dc4aa88cb1789bf1"; };
+    features = builtins.concatLists [
+      [ "curl" ]
+      [ "curl-sys" ]
+      [ "https" ]
+      [ "libssh2-sys" ]
+      [ "openssl-sys" ]
+      [ "ssh" ]
+      [ "ssh_key_from_memory" ]
+    ];
+    dependencies = {
+      curl_sys = rustPackages."registry+https://github.com/rust-lang/crates.io-index".curl-sys."0.4.17" { inherit profileName; };
+      libc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      libssh2_sys = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libssh2-sys."0.2.11" { inherit profileName; };
+      libz_sys = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libz-sys."1.0.25" { inherit profileName; };
+      ${ if hostPlatform.isUnix then "openssl_sys" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".openssl-sys."0.9.43" { inherit profileName; };
+    };
+    buildDependencies = {
+      cc = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".cc."1.0.31" { profileName = "__noProfile"; };
+      pkg_config = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".pkg-config."0.3.14" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".libssh2-sys."0.2.11" = overridableMkRustCrate (profileName: rec {
+    name = "libssh2-sys";
+    version = "0.2.11";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "126a1f4078368b163bfdee65fbab072af08a1b374a5551b21e87ade27b1fbf9d"; };
+    dependencies = {
+      libc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      libz_sys = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libz-sys."1.0.25" { inherit profileName; };
+      ${ if hostPlatform.isUnix then "openssl_sys" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".openssl-sys."0.9.43" { inherit profileName; };
+    };
+    buildDependencies = {
+      cc = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".cc."1.0.31" { profileName = "__noProfile"; };
+      pkg_config = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".pkg-config."0.3.14" { profileName = "__noProfile"; };
+      ${ if hostPlatform.parsed.abi.name == "msvc" then "vcpkg" else null } = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".vcpkg."0.2.6" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".libz-sys."1.0.25" = overridableMkRustCrate (profileName: rec {
+    name = "libz-sys";
+    version = "1.0.25";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "2eb5e43362e38e2bca2fd5f5134c4d4564a23a5c28e9b95411652021a8675ebe"; };
+    dependencies = {
+      libc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+    };
+    buildDependencies = {
+      cc = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".cc."1.0.31" { profileName = "__noProfile"; };
+      pkg_config = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".pkg-config."0.3.14" { profileName = "__noProfile"; };
+      ${ if hostPlatform.parsed.abi.name == "msvc" then "vcpkg" else null } = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".vcpkg."0.2.6" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".log."0.4.6" = overridableMkRustCrate (profileName: rec {
+    name = "log";
+    version = "0.4.6";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"; };
+    dependencies = {
+      cfg_if = rustPackages."registry+https://github.com/rust-lang/crates.io-index".cfg-if."0.1.7" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".matches."0.1.8" = overridableMkRustCrate (profileName: rec {
+    name = "matches";
+    version = "0.1.8";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".nodrop."0.1.13" = overridableMkRustCrate (profileName: rec {
+    name = "nodrop";
+    version = "0.1.13";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "2f9667ddcc6cc8a43afc9b7917599d7216aa09c463919ea32c59ed6cac8bc945"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".openssl-probe."0.1.2" = overridableMkRustCrate (profileName: rec {
+    name = "openssl-probe";
+    version = "0.1.2";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".openssl-sys."0.9.43" = overridableMkRustCrate (profileName: rec {
+    name = "openssl-sys";
+    version = "0.9.43";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "33c86834957dd5b915623e94f2f4ab2c70dd8f6b70679824155d5ae21dbd495d"; };
+    dependencies = {
+      libc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+    };
+    buildDependencies = {
+      cc = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".cc."1.0.31" { profileName = "__noProfile"; };
+      pkg_config = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".pkg-config."0.3.14" { profileName = "__noProfile"; };
+      rustc_version = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".rustc_version."0.2.3" { profileName = "__noProfile"; };
+      ${ if hostPlatform.parsed.abi.name == "msvc" then "vcpkg" else null } = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".vcpkg."0.2.6" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".percent-encoding."1.0.1" = overridableMkRustCrate (profileName: rec {
+    name = "percent-encoding";
+    version = "1.0.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".pkg-config."0.3.14" = overridableMkRustCrate (profileName: rec {
+    name = "pkg-config";
+    version = "0.3.14";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "676e8eb2b1b4c9043511a9b7bea0915320d7e502b0a079fb03f9635a5252b18c"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".predicates."1.0.0" = overridableMkRustCrate (profileName: rec {
+    name = "predicates";
+    version = "1.0.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "fa984b7cd021a0bf5315bcce4c4ae61d2a535db2a8d288fc7578638690a7b7c3"; };
+    features = builtins.concatLists [
+      [ "difference" ]
+    ];
+    dependencies = {
+      difference = rustPackages."registry+https://github.com/rust-lang/crates.io-index".difference."2.0.0" { inherit profileName; };
+      predicates_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".predicates-core."1.0.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".predicates-core."1.0.0" = overridableMkRustCrate (profileName: rec {
+    name = "predicates-core";
+    version = "1.0.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "06075c3a3e92559ff8929e7a280684489ea27fe44805174c3ebd9328dcb37178"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".predicates-tree."1.0.0" = overridableMkRustCrate (profileName: rec {
+    name = "predicates-tree";
+    version = "1.0.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "8e63c4859013b38a76eca2414c64911fba30def9e3202ac461a2d22831220124"; };
+    dependencies = {
+      predicates_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".predicates-core."1.0.0" { inherit profileName; };
+      treeline = rustPackages."registry+https://github.com/rust-lang/crates.io-index".treeline."0.1.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".proc-macro2."0.4.27" = overridableMkRustCrate (profileName: rec {
+    name = "proc-macro2";
+    version = "0.4.27";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "4d317f9caece796be1980837fd5cb3dfec5613ebdb04ad0956deea83ce168915"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "proc-macro" ]
+    ];
+    dependencies = {
+      unicode_xid = rustPackages."registry+https://github.com/rust-lang/crates.io-index".unicode-xid."0.1.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".quote."0.6.11" = overridableMkRustCrate (profileName: rec {
+    name = "quote";
+    version = "0.6.11";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "cdd8e04bd9c52e0342b406469d494fcb033be4bdbe5c606016defbb1681411e1"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "proc-macro" ]
+    ];
+    dependencies = {
+      proc_macro2 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".proc-macro2."0.4.27" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand."0.6.5" = overridableMkRustCrate (profileName: rec {
+    name = "rand";
+    version = "0.6.5";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "6d71dacdc3c88c1fde3885a3be3fbab9f35724e6ce99467f7d9c5026132184ca"; };
+    features = builtins.concatLists [
+      [ "alloc" ]
+      [ "default" ]
+      [ "rand_os" ]
+      [ "std" ]
+    ];
+    dependencies = {
+      ${ if hostPlatform.isUnix then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      rand_chacha = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_chacha."0.1.1" { inherit profileName; };
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.4.0" { inherit profileName; };
+      rand_hc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_hc."0.1.0" { inherit profileName; };
+      rand_isaac = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_isaac."0.1.1" { inherit profileName; };
+      rand_jitter = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_jitter."0.1.3" { inherit profileName; };
+      rand_os = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_os."0.1.3" { inherit profileName; };
+      rand_pcg = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_pcg."0.1.2" { inherit profileName; };
+      rand_xorshift = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_xorshift."0.1.1" { inherit profileName; };
+      ${ if hostPlatform.isWindows then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+    buildDependencies = {
+      autocfg = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".autocfg."0.1.2" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_chacha."0.1.1" = overridableMkRustCrate (profileName: rec {
+    name = "rand_chacha";
+    version = "0.1.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "556d3a1ca6600bfcbab7c7c91ccb085ac7fbbcd70e008a98742e7847f4f7bcef"; };
+    dependencies = {
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.3.1" { inherit profileName; };
+    };
+    buildDependencies = {
+      autocfg = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".autocfg."0.1.2" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_core."0.3.1" = overridableMkRustCrate (profileName: rec {
+    name = "rand_core";
+    version = "0.3.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"; };
+    dependencies = {
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.4.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_core."0.4.0" = overridableMkRustCrate (profileName: rec {
+    name = "rand_core";
+    version = "0.4.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "d0e7a549d590831370895ab7ba4ea0c1b6b011d106b5ff2da6eee112615e6dc0"; };
+    features = builtins.concatLists [
+      [ "alloc" ]
+      [ "std" ]
+    ];
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_hc."0.1.0" = overridableMkRustCrate (profileName: rec {
+    name = "rand_hc";
+    version = "0.1.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "7b40677c7be09ae76218dc623efbf7b18e34bced3f38883af07bb75630a21bc4"; };
+    dependencies = {
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.3.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_isaac."0.1.1" = overridableMkRustCrate (profileName: rec {
+    name = "rand_isaac";
+    version = "0.1.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "ded997c9d5f13925be2a6fd7e66bf1872597f759fd9dd93513dd7e92e5a5ee08"; };
+    dependencies = {
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.3.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_jitter."0.1.3" = overridableMkRustCrate (profileName: rec {
+    name = "rand_jitter";
+    version = "0.1.3";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "7b9ea758282efe12823e0d952ddb269d2e1897227e464919a554f2a03ef1b832"; };
+    features = builtins.concatLists [
+      [ "std" ]
+    ];
+    dependencies = {
+      ${ if hostPlatform.parsed.kernel.name == "darwin" || hostPlatform.parsed.kernel.name == "ios" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.4.0" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "windows" then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_os."0.1.3" = overridableMkRustCrate (profileName: rec {
+    name = "rand_os";
+    version = "0.1.3";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"; };
+    dependencies = {
+      ${ if hostPlatform.parsed.kernel.name == "cloudabi" then "cloudabi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".cloudabi."0.0.3" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "fuchsia" then "fuchsia_cprng" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".fuchsia-cprng."0.1.1" { inherit profileName; };
+      ${ if hostPlatform.isUnix then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.4.0" { inherit profileName; };
+      ${ if hostPlatform.parsed.abi.name == "sgx" then "rdrand" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rdrand."0.4.0" { inherit profileName; };
+      ${ if hostPlatform.isWindows then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_pcg."0.1.2" = overridableMkRustCrate (profileName: rec {
+    name = "rand_pcg";
+    version = "0.1.2";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"; };
+    dependencies = {
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.4.0" { inherit profileName; };
+    };
+    buildDependencies = {
+      autocfg = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".autocfg."0.1.2" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rand_xorshift."0.1.1" = overridableMkRustCrate (profileName: rec {
+    name = "rand_xorshift";
+    version = "0.1.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"; };
+    dependencies = {
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.3.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rdrand."0.4.0" = overridableMkRustCrate (profileName: rec {
+    name = "rdrand";
+    version = "0.4.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "std" ]
+    ];
+    dependencies = {
+      rand_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_core."0.3.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".redox_syscall."0.1.51" = overridableMkRustCrate (profileName: rec {
+    name = "redox_syscall";
+    version = "0.1.51";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "423e376fffca3dfa06c9e9790a9ccd282fafb3cc6e6397d01dbf64f9bacc6b85"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".redox_termios."0.1.1" = overridableMkRustCrate (profileName: rec {
+    name = "redox_termios";
+    version = "0.1.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"; };
+    dependencies = {
+      syscall = rustPackages."registry+https://github.com/rust-lang/crates.io-index".redox_syscall."0.1.51" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".redox_users."0.3.0" = overridableMkRustCrate (profileName: rec {
+    name = "redox_users";
+    version = "0.3.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "3fe5204c3a17e97dde73f285d49be585df59ed84b50a872baf416e73b62c3828"; };
+    dependencies = {
+      argon2rs = rustPackages."registry+https://github.com/rust-lang/crates.io-index".argon2rs."0.2.5" { inherit profileName; };
+      failure = rustPackages."registry+https://github.com/rust-lang/crates.io-index".failure."0.1.5" { inherit profileName; };
+      rand_os = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand_os."0.1.3" { inherit profileName; };
+      syscall = rustPackages."registry+https://github.com/rust-lang/crates.io-index".redox_syscall."0.1.51" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".remove_dir_all."0.5.1" = overridableMkRustCrate (profileName: rec {
+    name = "remove_dir_all";
+    version = "0.5.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "3488ba1b9a2084d38645c4c08276a1752dcbf2c7130d74f1569681ad5d2799c5"; };
+    dependencies = {
+      ${ if hostPlatform.isWindows then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+  });
+  
+  "unknown".rmob."0.1.0" = overridableMkRustCrate (profileName: rec {
+    name = "rmob";
+    version = "0.1.0";
+    registry = "unknown";
+    src = fetchCrateLocal ./.;
+    dependencies = {
+      assert_cmd = rustPackages."registry+https://github.com/rust-lang/crates.io-index".assert_cmd."0.11.0" { inherit profileName; };
+      dirs = rustPackages."registry+https://github.com/rust-lang/crates.io-index".dirs."1.0.5" { inherit profileName; };
+      git2 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".git2."0.8.0" { inherit profileName; };
+      serde = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde."1.0.89" { inherit profileName; };
+      serde_json = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde_json."1.0.39" { inherit profileName; };
+      structopt = rustPackages."registry+https://github.com/rust-lang/crates.io-index".structopt."0.2.15" { inherit profileName; };
+      tempfile = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tempfile."3.0.7" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rustc-demangle."0.1.13" = overridableMkRustCrate (profileName: rec {
+    name = "rustc-demangle";
+    version = "0.1.13";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "adacaae16d02b6ec37fdc7acfcddf365978de76d1983d3ee22afc260e1ca9619"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".rustc_version."0.2.3" = overridableMkRustCrate (profileName: rec {
+    name = "rustc_version";
+    version = "0.2.3";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"; };
+    dependencies = {
+      semver = rustPackages."registry+https://github.com/rust-lang/crates.io-index".semver."0.9.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".ryu."0.2.7" = overridableMkRustCrate (profileName: rec {
+    name = "ryu";
+    version = "0.2.7";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "eb9e9b8cde282a9fe6a42dd4681319bfb63f121b8a8ee9439c6f4107e58a46f7"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".scoped_threadpool."0.1.9" = overridableMkRustCrate (profileName: rec {
+    name = "scoped_threadpool";
+    version = "0.1.9";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".semver."0.9.0" = overridableMkRustCrate (profileName: rec {
+    name = "semver";
+    version = "0.9.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+    dependencies = {
+      semver_parser = rustPackages."registry+https://github.com/rust-lang/crates.io-index".semver-parser."0.7.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".semver-parser."0.7.0" = overridableMkRustCrate (profileName: rec {
+    name = "semver-parser";
+    version = "0.7.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".serde."1.0.89" = overridableMkRustCrate (profileName: rec {
+    name = "serde";
+    version = "1.0.89";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "92514fb95f900c9b5126e32d020f5c6d40564c27a5ea6d1d7d9f157a96623560"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "derive" ]
+      [ "serde_derive" ]
+      [ "std" ]
+    ];
+    dependencies = {
+      serde_derive = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".serde_derive."1.0.89" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".serde_derive."1.0.89" = overridableMkRustCrate (profileName: rec {
+    name = "serde_derive";
+    version = "1.0.89";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "bb6eabf4b5914e88e24eea240bb7c9f9a2cbc1bbbe8d961d381975ec3c6b806c"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+    dependencies = {
+      proc_macro2 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".proc-macro2."0.4.27" { inherit profileName; };
+      quote = rustPackages."registry+https://github.com/rust-lang/crates.io-index".quote."0.6.11" { inherit profileName; };
+      syn = rustPackages."registry+https://github.com/rust-lang/crates.io-index".syn."0.15.29" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".serde_json."1.0.39" = overridableMkRustCrate (profileName: rec {
+    name = "serde_json";
+    version = "1.0.39";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "5a23aa71d4a4d43fdbfaac00eff68ba8a06a51759a89ac3304323e800c4dd40d"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+    dependencies = {
+      itoa = rustPackages."registry+https://github.com/rust-lang/crates.io-index".itoa."0.4.3" { inherit profileName; };
+      ryu = rustPackages."registry+https://github.com/rust-lang/crates.io-index".ryu."0.2.7" { inherit profileName; };
+      serde = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde."1.0.89" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".smallvec."0.6.9" = overridableMkRustCrate (profileName: rec {
+    name = "smallvec";
+    version = "0.6.9";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "c4488ae950c49d403731982257768f48fada354a5203fe81f9bb6f43ca9002be"; };
+    features = builtins.concatLists [
+      [ "default" ]
+      [ "std" ]
+    ];
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".strsim."0.7.0" = overridableMkRustCrate (profileName: rec {
+    name = "strsim";
+    version = "0.7.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".structopt."0.2.15" = overridableMkRustCrate (profileName: rec {
+    name = "structopt";
+    version = "0.2.15";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "3d0760c312538987d363c36c42339b55f5ee176ea8808bbe4543d484a291c8d1"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+    dependencies = {
+      clap = rustPackages."registry+https://github.com/rust-lang/crates.io-index".clap."2.32.0" { inherit profileName; };
+      structopt_derive = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".structopt-derive."0.2.15" { profileName = "__noProfile"; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".structopt-derive."0.2.15" = overridableMkRustCrate (profileName: rec {
+    name = "structopt-derive";
+    version = "0.2.15";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "528aeb7351d042e6ffbc2a6fb76a86f9b622fdf7c25932798e7a82cb03bc94c6"; };
+    dependencies = {
+      heck = rustPackages."registry+https://github.com/rust-lang/crates.io-index".heck."0.3.1" { inherit profileName; };
+      proc_macro2 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".proc-macro2."0.4.27" { inherit profileName; };
+      quote = rustPackages."registry+https://github.com/rust-lang/crates.io-index".quote."0.6.11" { inherit profileName; };
+      syn = rustPackages."registry+https://github.com/rust-lang/crates.io-index".syn."0.15.29" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".syn."0.15.29" = overridableMkRustCrate (profileName: rec {
+    name = "syn";
+    version = "0.15.29";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "1825685f977249735d510a242a6727b46efe914bb67e38d30c071b1b72b1d5c2"; };
+    features = builtins.concatLists [
+      [ "clone-impls" ]
+      [ "default" ]
+      [ "derive" ]
+      [ "extra-traits" ]
+      [ "parsing" ]
+      [ "printing" ]
+      [ "proc-macro" ]
+      [ "quote" ]
+      [ "visit" ]
+    ];
+    dependencies = {
+      proc_macro2 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".proc-macro2."0.4.27" { inherit profileName; };
+      quote = rustPackages."registry+https://github.com/rust-lang/crates.io-index".quote."0.6.11" { inherit profileName; };
+      unicode_xid = rustPackages."registry+https://github.com/rust-lang/crates.io-index".unicode-xid."0.1.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".synstructure."0.10.1" = overridableMkRustCrate (profileName: rec {
+    name = "synstructure";
+    version = "0.10.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "73687139bf99285483c96ac0add482c3776528beac1d97d444f6e91f203a2015"; };
+    dependencies = {
+      proc_macro2 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".proc-macro2."0.4.27" { inherit profileName; };
+      quote = rustPackages."registry+https://github.com/rust-lang/crates.io-index".quote."0.6.11" { inherit profileName; };
+      syn = rustPackages."registry+https://github.com/rust-lang/crates.io-index".syn."0.15.29" { inherit profileName; };
+      unicode_xid = rustPackages."registry+https://github.com/rust-lang/crates.io-index".unicode-xid."0.1.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".tempfile."3.0.7" = overridableMkRustCrate (profileName: rec {
+    name = "tempfile";
+    version = "3.0.7";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "b86c784c88d98c801132806dadd3819ed29d8600836c4088e855cdf3e178ed8a"; };
+    dependencies = {
+      cfg_if = rustPackages."registry+https://github.com/rust-lang/crates.io-index".cfg-if."0.1.7" { inherit profileName; };
+      ${ if hostPlatform.isUnix then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      rand = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand."0.6.5" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "redox" then "syscall" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".redox_syscall."0.1.51" { inherit profileName; };
+      remove_dir_all = rustPackages."registry+https://github.com/rust-lang/crates.io-index".remove_dir_all."0.5.1" { inherit profileName; };
+      ${ if hostPlatform.isWindows then "winapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".termion."1.5.1" = overridableMkRustCrate (profileName: rec {
+    name = "termion";
+    version = "1.5.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"; };
+    dependencies = {
+      ${ if !(hostPlatform.parsed.kernel.name == "redox") then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.50" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "redox" then "syscall" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".redox_syscall."0.1.51" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "redox" then "redox_termios" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".redox_termios."0.1.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".textwrap."0.10.0" = overridableMkRustCrate (profileName: rec {
+    name = "textwrap";
+    version = "0.10.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"; };
+    dependencies = {
+      unicode_width = rustPackages."registry+https://github.com/rust-lang/crates.io-index".unicode-width."0.1.5" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".treeline."0.1.0" = overridableMkRustCrate (profileName: rec {
+    name = "treeline";
+    version = "0.1.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "a7f741b240f1a48843f9b8e0444fb55fb2a4ff67293b50a9179dfd5ea67f8d41"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".unicode-bidi."0.3.4" = overridableMkRustCrate (profileName: rec {
+    name = "unicode-bidi";
+    version = "0.3.4";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+    dependencies = {
+      matches = rustPackages."registry+https://github.com/rust-lang/crates.io-index".matches."0.1.8" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".unicode-normalization."0.1.8" = overridableMkRustCrate (profileName: rec {
+    name = "unicode-normalization";
+    version = "0.1.8";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "141339a08b982d942be2ca06ff8b076563cbe223d1befd5450716790d44e2426"; };
+    dependencies = {
+      smallvec = rustPackages."registry+https://github.com/rust-lang/crates.io-index".smallvec."0.6.9" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".unicode-segmentation."1.2.1" = overridableMkRustCrate (profileName: rec {
+    name = "unicode-segmentation";
+    version = "1.2.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "aa6024fc12ddfd1c6dbc14a80fa2324d4568849869b779f6bd37e5e4c03344d1"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".unicode-width."0.1.5" = overridableMkRustCrate (profileName: rec {
+    name = "unicode-width";
+    version = "0.1.5";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".unicode-xid."0.1.0" = overridableMkRustCrate (profileName: rec {
+    name = "unicode-xid";
+    version = "0.1.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"; };
+    features = builtins.concatLists [
+      [ "default" ]
+    ];
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".url."1.7.2" = overridableMkRustCrate (profileName: rec {
+    name = "url";
+    version = "1.7.2";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "dd4e7c0d531266369519a4aa4f399d748bd37043b00bde1e4ff1f60a120b355a"; };
+    dependencies = {
+      idna = rustPackages."registry+https://github.com/rust-lang/crates.io-index".idna."0.1.5" { inherit profileName; };
+      matches = rustPackages."registry+https://github.com/rust-lang/crates.io-index".matches."0.1.8" { inherit profileName; };
+      percent_encoding = rustPackages."registry+https://github.com/rust-lang/crates.io-index".percent-encoding."1.0.1" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".vcpkg."0.2.6" = overridableMkRustCrate (profileName: rec {
+    name = "vcpkg";
+    version = "0.2.6";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "def296d3eb3b12371b2c7d0e83bfe1403e4db2d7a0bba324a12b21c4ee13143d"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".vec_map."0.8.1" = overridableMkRustCrate (profileName: rec {
+    name = "vec_map";
+    version = "0.8.1";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" = overridableMkRustCrate (profileName: rec {
+    name = "winapi";
+    version = "0.3.6";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"; };
+    features = builtins.concatLists [
+      [ "consoleapi" ]
+      [ "dbghelp" ]
+      [ "errhandlingapi" ]
+      [ "fileapi" ]
+      [ "handleapi" ]
+      [ "knownfolders" ]
+      [ "minwinbase" ]
+      [ "minwindef" ]
+      [ "ntsecapi" ]
+      [ "objbase" ]
+      [ "processenv" ]
+      [ "processthreadsapi" ]
+      [ "profileapi" ]
+      [ "shlobj" ]
+      [ "std" ]
+      [ "winbase" ]
+      [ "winerror" ]
+      [ "winnt" ]
+      [ "winsock2" ]
+      [ "ws2def" ]
+    ];
+    dependencies = {
+      ${ if hostPlatform.config == "i686-pc-windows-gnu" || hostPlatform.config == "i686-pc-windows-gnu" || hostPlatform.config == "i686-pc-windows-gnu" || hostPlatform.config == "i686-pc-windows-gnu" || hostPlatform.config == "i686-pc-windows-gnu" || hostPlatform.config == "i686-pc-windows-gnu" || hostPlatform.config == "i686-pc-windows-gnu" then "winapi_i686_pc_windows_gnu" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi-i686-pc-windows-gnu."0.4.0" { inherit profileName; };
+      ${ if hostPlatform.config == "x86_64-pc-windows-gnu" || hostPlatform.config == "x86_64-pc-windows-gnu" || hostPlatform.config == "x86_64-pc-windows-gnu" || hostPlatform.config == "x86_64-pc-windows-gnu" || hostPlatform.config == "x86_64-pc-windows-gnu" || hostPlatform.config == "x86_64-pc-windows-gnu" || hostPlatform.config == "x86_64-pc-windows-gnu" then "winapi_x86_64_pc_windows_gnu" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".winapi-x86_64-pc-windows-gnu."0.4.0" { inherit profileName; };
+    };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".winapi-i686-pc-windows-gnu."0.4.0" = overridableMkRustCrate (profileName: rec {
+    name = "winapi-i686-pc-windows-gnu";
+    version = "0.4.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"; };
+  });
+  
+  "registry+https://github.com/rust-lang/crates.io-index".winapi-x86_64-pc-windows-gnu."0.4.0" = overridableMkRustCrate (profileName: rec {
+    name = "winapi-x86_64-pc-windows-gnu";
+    version = "0.4.0";
+    registry = "registry+https://github.com/rust-lang/crates.io-index";
+    src = fetchCratesIo { inherit name version; sha256 = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"; };
+  });
+  
+}
diff --git a/README.md b/README.md
index a5e4005..1b5289c 100644
--- a/README.md
+++ b/README.md
@@ -13,16 +13,18 @@ Includes `Co-authored by` lines in commits for ye automatically when ye collabor
 ## Embark
 
 1. `git clone` this ship
-1. `cargo build` and `cargo install --path .` for now
-1. Add co-pirates by running:
+2. Install `rmob` on your machine using one of the commands below:
+   * Standard: `cargo install --path .`
+   * Nix: `nix-env -iA package -f .`
+3. Add co-pirates by running:
     ```bash
     rmob copirate enlist cb "Charlotte de Berry" "berrydeath@england.pir"
     ```
-1. In your repo, `rmob embark`
-1. `rmob sail` away!
+4. In your repo, `rmob embark`
+5. `rmob sail` away!
 
 ---
-```
+```text
 Rmob 0.1.0
 Arr! Git mobbing in Rust
 
diff --git a/crate.nix b/crate.nix
deleted file mode 100644
index 8bb980e..0000000
--- a/crate.nix
+++ /dev/null
@@ -1,68 +0,0 @@
-# Generated by cargo2nix 0.3.0
-({
-    pkgs
-  , buildPackages
-  , lib
-  , resolver
-  , packageFun
-  , config
-  , buildConfig
-  , cargo
-  , rustc
-}:
-  let
-    inherit (lib) recursiveUpdate;
-    resolver-overlay = {
-      resolver = (args@{
-          source
-        , name
-        , version
-        , sha256
-        , source-info
-      }:
-        if source == "registry+https://github.com/rust-lang/crates.io-index" then
-          pkgs.rustBuilder.rustLib.fetchCratesIo {
-            inherit name;
-            inherit version;
-            inherit sha256;
-          }
-        else
-          resolver args);
-    };
-    config' = lib.recursiveUpdate config resolver-overlay;
-    buildConfig' = lib.recursiveUpdate buildConfig resolver-overlay;
-    bootstrap = pkgs.rustBuilder.makePackageSet {
-      inherit cargo;
-      inherit rustc;
-      inherit packageFun;
-      rustPackageConfig = config';
-      buildRustPackages = buildPackages.rustBuilder.makePackageSet {
-        inherit cargo;
-        inherit rustc;
-        inherit packageFun;
-        rustPackageConfig = config';
-      };
-    };
-    all-features = lib.fold lib.recursiveUpdate {} [
-      ((bootstrap.unknown.rmob."0.1.0" {}).computePackageFeatures [])
-    ];
-    features = lib.fold lib.recursiveUpdate {} (lib.mapAttrsToList (_:
-      (features:
-        features)) all-features);
-  in
-  pkgs.rustBuilder.makePackageSet {
-    inherit cargo;
-    inherit rustc;
-    inherit packageFun;
-    rustPackageConfig = lib.recursiveUpdate config' {
-      inherit features;
-    };
-    buildRustPackages = buildPackages.rustBuilder.makePackageSet {
-      inherit cargo;
-      inherit rustc;
-      inherit packageFun;
-      rustPackageConfig = lib.recursiveUpdate buildConfig' {
-        inherit features;
-      };
-    };
-  })
\ No newline at end of file
diff --git a/default.nix b/default.nix
index 8035353..5082367 100644
--- a/default.nix
+++ b/default.nix
@@ -1,159 +1,37 @@
 {
-  nixpkgsPath ? ./nixpkgs.nix,
+  sources ? import ./nix/sources.nix,
   system ? builtins.currentSystem,
+  crossSystem ? null,
   overlays ? [],
-  crossSystem ? (import <nixpkgs/lib>).systems.examples.musl64,
 }:
 let
-  version = "0.1.0";
+  inherit (sources) nixpkgs nixpkgsMozilla cargo2nix;
 
-  # mozilla nixpkgs rust overlay
-  nixpkgs-mozilla = builtins.fetchGit {
-    url = https://github.com/mozilla/nixpkgs-mozilla;
-    ref = "master";
-    rev = "50bae918794d3c283aeb335b209efd71e75e3954";
-  };
-  rustOverlay = import "${nixpkgs-mozilla}/rust-overlay.nix";
-
-  cargo2nix = builtins.fetchGit {
-    url = https://github.com/tenx-tech/cargo2nix;
-    ref = "master";
-    rev = "7208abba93c2e92b92f0788158a0a935c39e57b8";
-  };
-  cargo2nixOverlay = import "${cargo2nix}/overlay";
-
-  # bootstrap Nixpkgs with the overlays
-  pkgs = import nixpkgsPath {
+  pkgs = import nixpkgs {
     inherit system crossSystem;
-    overlays = overlays ++ [ rustOverlay cargo2nixOverlay ];
-  };
-
-  inherit (pkgs) lib;
-
-  # openssl supply
-  openssl =
-    pkgs:
-      pkgs.buildPackages.symlinkJoin {
-        name = "openssl";
-        paths = with pkgs.openssl; [out dev];
-      };
-
-  # macos frameworks supply, if on darwin
-  macosFrameworks = if pkgs.stdenv.isDarwin
-    then
-      with pkgs.darwin.apple_sdk.frameworks;
-      [Security CoreServices]
-    else [];
-
-  # choice of rustc
-  rustChannel = pkgs.buildPackages.rustChannelOf {
-    channel = "1.37.0";
-  };
-
-  inherit (rustChannel) cargo;
-  rustc = rustChannel.rust.override {
-    targets = [
-      (pkgs.rustBuilder.rustLib.realHostTriple pkgs.stdenv.targetPlatform)
-      "aarch64-unknown-linux-gnu"
+    overlays =
+      let
+        rustOverlay = import "${nixpkgsMozilla}/rust-overlay.nix";
+        cargo2nixOverlay = import "${cargo2nix}/overlay";
+      in
+        overlays ++ [ cargo2nixOverlay rustOverlay ];
+  };
+
+  rustPkgs = pkgs.rustBuilder.makePackageSet' {
+    rustChannel = "1.37.0";
+    packageFun = import ./Cargo.nix;
+    localPatterns = [
+      ''^(src)(/.*)?'' # Integration test in `tests/` doesn't work in sandbox.
+      ''[^/]*\.(rs|toml)$''
     ];
   };
-
-  # source filter
-  srcFilter = {src, name, type}:
-    (type == "regular" && lib.hasSuffix ".nix" (baseNameOf name) -> false) &&
-    (type == "regular" && lib.hasPrefix "." (baseNameOf name) -> false) &&
-    (type == "symlink" && lib.hasPrefix "${toString src}/result" name -> false) &&
-    (type == "unknown" -> false)
-  ;
-
-  # define source location
-  resolver = let version' = version; in { source, name, version, ... }: {
-    unknown.rmob.${version'} = pkgs.rustBuilder.rustLib.cleanLocalSource srcFilter ./.;
-  }.${source}.${name}.${version};
-
-  # build your crate
-  packageFun = import ./deps.nix;
-
-  config = pkgs: {
-    rustcflags = {
-      "registry+https://github.com/rust-lang/crates.io-index"."*" = [
-        "--cap-lints"
-        "warn"
-      ];
-    };
-    environment = {
-      "registry+https://github.com/rust-lang/crates.io-index".openssl-sys."*".OPENSSL_DIR = openssl pkgs;
-    };
-
-    buildInputs = {
-      unknown.rmob."*" = with pkgs; [ libiconv ] ++ macosFrameworks;
-      "registry+https://github.com/rust-lang/crates.io-index".curl-sys."*" = with pkgs; [ nghttp2 ] ++ macosFrameworks;
-      "registry+https://github.com/rust-lang/crates.io-index".libgit2-sys."*" = with pkgs; [ libiconv ] ++ macosFrameworks;
-    };
-  };
-
-  rustPackages = pkgs.callPackage ./crate.nix {
-    inherit packageFun rustc cargo resolver;
-    config = config pkgs;
-    buildConfig = config pkgs.buildPackages;
-  };
-
-  # done
-
-  # your rust build is available here
-  package = rustPackages.unknown.rmob.${version} {
-    freezeFeatures = true;
-    meta.platforms = lib.platforms.darwin ++ lib.platforms.linux;
-  };
-
-  # how to use cargo2nix to speed up resolution:
-
-  resolveResponse =
-    let
-      request =
-        builtins.toFile
-          "resolve-request.json"
-          (builtins.toJSON
-            (pkgs.rustBuilder.rustLib.buildResolveRequest {
-              initial = [
-                {
-                  package-id = "rmob ${version}";
-                }
-              ];
-              inherit (pkgs) stdenv;
-              inherit packageFun;
-            }));
-    in
-    lib.importJSON
-      (pkgs.runCommand
-        "resolve"
-        { nativeBuildInputs = [package]; }
-        "cargo2nix resolve <${request} >$out");
-
-  rustPackagesWithResolve = pkgs.callPackage ./crate.nix {
-    inherit packageFun rustc cargo resolver;
-    config = config pkgs // { resolve = resolveResponse; };
-    buildConfig = config pkgs.buildPackages // { resolve = resolveResponse; };
-  };
-
 in
-{
-  inherit package;
-
-  package' = rustPackagesWithResolve.unknown.rmob.${version} {};
-
-
-  # and you can make a development shell
-  shell = pkgs.rustBuilder.makeShell {
-    inherit packageFun cargo rustc;
-    packageResolver = { source, name, version, sha256, ... }:
-      {
-        src = resolver { inherit source name version; };
-      };
-    excludeCrates.unknown = "*";
-    environment.OPENSSL_DIR = openssl pkgs;
-    nativeBuildInputs = [ pkgs.buildPackages.buildPackages.jq ];
-
-    inherit (rustPackages.config) features;
-  };
-}
+  rec {
+    inherit rustPkgs;
+    package = rustPkgs.workspace.rmob {};
+    ci = pkgs.rustBuilder.runTests rustPkgs.workspace.rmob { depsBuildBuild = [ pkgs.git ]; };
+    shell = pkgs.mkShell {
+      inputsFrom = pkgs.lib.mapAttrsToList (_: pkg: pkg {}) rustPkgs.noBuild.workspace;
+      nativeBuildInputs = with rustPkgs; [ cargo rustc ];
+    };
+  }
diff --git a/deps.nix b/deps.nix
deleted file mode 100644
index 6c303ab..0000000
--- a/deps.nix
+++ /dev/null
@@ -1,7318 +0,0 @@
-# Generated by cargo2nix 0.3.0
-({
-    pkgs
-  , callPackage
-  , mkRustCrate
-  , config
-  , ...
-}:
-  (self:
-    {
-      "registry+https://github.com/rust-lang/crates.io-index".ansi_term."0.11.0" = mkRustCrate {
-        package-id = "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)";
-        src = config.resolver {
-          source = "registry+https://github.com/rust-lang/crates.io-index";
-          name = "ansi_term";
-          version = "0.11.0";
-          sha256 = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b";
-          source-info = {
-            index = "registry+https://github.com/rust-lang/crates.io-index";
-          };
-        };
-        dependencies = [
-          {
-            toml-names = [
-              "winapi"
-            ];
-            extern-name = "winapi";
-            package-id = "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)";
-          }
-        ];
-        cargo-manifest = {
-          package = {
-            name = "ansi_term";
-            version = "0.11.0";
-            authors = [
-              "ogham@bsago.me"
-              "Ryan Scheel (Havvy) <ryan.havvy@gmail.com>"
-              "Josh Triplett <josh@joshtriplett.org>"
-            ];
-            description = "Library for ANSI terminal colours and styles (bold, underline)";
-            homepage = "https://github.com/ogham/rust-ansi-term";
-            documentation = "https://docs.rs/ansi_term";
-            readme = "README.md";
-            license = "MIT";
-          };
-          lib = {
-            name = "ansi_term";
-          };
-          target = {
-            "cfg(target_os=\"windows\")" = {
-              dependencies = {
-                winapi = {
-                  version = "0.3.4";
-                  features = [
-                    "errhandlingapi"
-                    "consoleapi"
-                    "processenv"
-                  ];
-                };
-              };
-            };
-          };
-        };
-      };
-      "registry+https://github.com/rust-lang/crates.io-index".argon2rs."0.2.5" = mkRustCrate {
-        package-id = "argon2rs 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)";
-        src = config.resolver {
-          source = "registry+https://github.com/rust-lang/crates.io-index";
-          name = "argon2rs";
-          version = "0.2.5";
-          sha256 = "3f67b0b6a86dae6e67ff4ca2b6201396074996379fba2b92ff649126f37cb392";
-          source-info = {
-            index = "registry+https://github.com/rust-lang/crates.io-index";
-          };
-        };
-        dependencies = [
-          {
-            toml-names = [
-              "blake2-rfc"
-            ];
-            extern-name = "blake2_rfc";
-            package-id = "blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)";
-          }
-          {
-            toml-names = [
-              "scoped_threadpool"
-            ];
-            extern-name = "scoped_threadpool";
-            package-id = "scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)";
-          }
-        ];
-        cargo-manifest = {
-          package = {
-            name = "argon2rs";
-            version = "0.2.5";
-            authors = [
-              "bryant <bryant@defrag.in>"
-            ];
-            description = "The pure Rust password hashing library that runs on Argon2.";
-            documentation = "http://bryant.github.io/argon2rs/argon2rs/";
-            readme = "README.md";
-            keywords = [
-              "crypto"
-              "argon2"
-              "argon2i"
-              "argon2d"
-              "hash"
-            ];
-            license = "MIT";
-            repository = "https://github.com/bryant/argon2rs";
-          };
-          dependencies = {
-            blake2-rfc = "0.2.16";
-            scoped_threadpool = "0.1.7";
-          };
-          dev-dependencies = {
-            cargon = {
-              version = "0.0.1";
-              path = "benches/cargon";
-            };
-          };
-          features = {
-            default = [];
-            simd = [
-              "blake2-rfc/simd_asm"
-            ];
-          };
-        };
-      };
-      "registry+https://github.com/rust-lang/crates.io-index".arrayvec."0.4.10" = mkRustCrate {
-        package-id = "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)";
-        src = config.resolver {
-          source = "registry+https://github.com/rust-lang/crates.io-index";
-          name = "arrayvec";
-          version = "0.4.10";
-          sha256 = "92c7fb76bc8826a8b33b4ee5bb07a247a81e76764ab4d55e8f73e3a4d8808c71";
-          source-info = {
-            index = "registry+https://github.com/rust-lang/crates.io-index";
-          };
-        };
-        dependencies = [
-          {
-            toml-names = [
-              "nodrop"
-            ];
-            extern-name = "nodrop";
-            package-id = "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)";
-          }
-        ];
-        cargo-manifest = {
-          package = {
-            name = "arrayvec";
-            version = "0.4.10";
-            authors = [
-              "bluss"
-            ];
-            description = "A vector with fixed capacity, backed by an array (it can be stored on the stack too). Implements fixed capacity ArrayVec and ArrayString.";
-            documentation = "https://docs.rs/arrayvec/";
-            keywords = [
-              "stack"
-              "vector"
-              "array"
-              "data-structure"
-              "no_std"
-            ];
-            categories = [
-              "data-structures"
-              "no-std"
-            ];
-            license = "MIT/Apache-2.0";
-            repository = "https://github.com/bluss/arrayvec";
-            metadata = {
-              docs = {
-                rs = {
-                  features = [
-                    "serde-1"
-                  ];
-                };
-              };
-              release = {
-                no-dev-version = true;
-              };
-            };
-          };
-          bench = [
-            {
-              name = "extend";
-              harness = false;
-            }
-            {
-              name = "arraystring";
-              harness = false;
-            }
-          ];
-          dependencies = {
-            nodrop = {
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-            travis-ci = {
-              branch = "master";
-              repository = "mcgoo/vcpkg-rs";
-            };
-          };
-        };
-      };
-      "registry+https://github.com/rust-lang/crates.io-index".vec_map."0.8.1" = mkRustCrate {
-        package-id = "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)";
-        src = config.resolver {
-          source = "registry+https://github.com/rust-lang/crates.io-index";
-          name = "vec_map";
-          version = "0.8.1";
-          sha256 = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a";
-          source-info = {
-            index = "registry+https://github.com/rust-lang/crates.io-index";
-          };
-        };
-        dependencies = [];
-        cargo-manifest = {
-          package = {
-            name = "vec_map";
-            version = "0.8.1";
-            authors = [
-              "Alex Crichton <alex@alexcrichton.com>"
-              "Jorge Aparicio <japaricious@gmail.com>"
-              "Alexis Beingessner <a.beingessner@gmail.com>"
-              "Brian Anderson <>"
-              "tbu- <>"
-              "Manish Goregaokar <>"
-              "Aaron Turon <aturon@mozilla.com>"
-              "Adolfo Ochagavía <>"
-              "Niko Matsakis <>"
-              "Steven Fackler <>"
-              "Chase Southwood <csouth3@illinois.edu>"
-              "Eduard Burtescu <>"
-              "Florian Wilkens <>"
-              "Félix Raimundo <>"
-              "Tibor Benke <>"
-              "Markus Siemens <markus@m-siemens.de>"
-              "Josh Branchaud <jbranchaud@gmail.com>"
-              "Huon Wilson <dbau.pp@gmail.com>"
-              "Corey Farwell <coref@rwell.org>"
-              "Aaron Liblong <>"
-              "Nick Cameron <nrc@ncameron.org>"
-              "Patrick Walton <pcwalton@mimiga.net>"
-              "Felix S Klock II <>"
-              "Andrew Paseltiner <apaseltiner@gmail.com>"
-              "Sean McArthur <sean.monstar@gmail.com>"
-              "Vadim Petrochenkov <>"
-            ];
-            description = "A simple map based on a vector for small integer keys";
-            homepage = "https://github.com/contain-rs/vec-map";
-            documentation = "https://contain-rs.github.io/vec-map/vec_map";
-            readme = "README.md";
-            keywords = [
-              "data-structures"
-              "collections"
-              "vecmap"
-              "vec_map"
-              "contain-rs"
-            ];
-            license = "MIT/Apache-2.0";
-            repository = "https://github.com/contain-rs/vec-map";
-          };
-          dependencies = {
-            serde = {
-              version = "1.0";
-              features = [
-                "derive"
-              ];
-              optional = true;
-            };
-          };
-          features = {
-            eders = [
-              "serde"
-            ];
-          };
-        };
-      };
-      "registry+https://github.com/rust-lang/crates.io-index".winapi."0.3.6" = mkRustCrate {
-        package-id = "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)";
-        src = config.resolver {
-          source = "registry+https://github.com/rust-lang/crates.io-index";
-          name = "winapi";
-          version = "0.3.6";
-          sha256 = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0";
-          source-info = {
-            index = "registry+https://github.com/rust-lang/crates.io-index";
-          };
-        };
-        dependencies = [
-          {
-            toml-names = [
-              "winapi-i686-pc-windows-gnu"
-              "winapi-i686-pc-windows-gnu"
-              "winapi-i686-pc-windows-gnu"
-              "winapi-i686-pc-windows-gnu"
-              "winapi-i686-pc-windows-gnu"
-              "winapi-i686-pc-windows-gnu"
-              "winapi-i686-pc-windows-gnu"
-            ];
-            extern-name = "winapi_i686_pc_windows_gnu";
-            package-id = "winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)";
-          }
-          {
-            toml-names = [
-              "winapi-x86_64-pc-windows-gnu"
-              "winapi-x86_64-pc-windows-gnu"
-              "winapi-x86_64-pc-windows-gnu"
-              "winapi-x86_64-pc-windows-gnu"
-              "winapi-x86_64-pc-windows-gnu"
-              "winapi-x86_64-pc-windows-gnu"
-              "winapi-x86_64-pc-windows-gnu"
-            ];
-            extern-name = "winapi_x86_64_pc_windows_gnu";
-            package-id = "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)";
-          }
-        ];
-        cargo-manifest = {
-          package = {
-            name = "winapi";
-            version = "0.3.6";
-            authors = [
-              "Peter Atashian <retep998@gmail.com>"
-            ];
-            build = "build.rs";
-            include = [
-              "/src/**/*"
-              "/Cargo.toml"
-              "/LICENSE-MIT"
-              "/LICENSE-APACHE"
-              "/build.rs"
-              "/README.md"
-            ];
-            description = "Raw FFI bindings for all of Windows API.";
-            documentation = "https://docs.rs/winapi/*/x86_64-pc-windows-msvc/winapi/";
-            readme = "README.md";
-            keywords = [
-              "windows"
-              "ffi"
-              "win32"
-              "com"
-              "directx"
-            ];
-            categories = [
-              "external-ffi-bindings"
-              "no-std"
-              "os::windows-apis"
-            ];
-            license = "MIT/Apache-2.0";
-            repository = "https://github.com/retep998/winapi-rs";
-            metadata = {
-              docs = {
-                rs = {
-                  default-target = "x86_64-pc-windows-msvc";
-                  features = [
-                    "everything"
-                  ];
-                };
-              };
-            };
-          };
-          features = {
-            accctrl = [];
-            aclapi = [];
-            activation = [];
-            appmgmt = [];
-            audioclient = [];
-            audiosessiontypes = [];
-            avrt = [];
-            basetsd = [];
-            bcrypt = [];
-            bits = [];
-            bits10_1 = [];
-            bits1_5 = [];
-            bits2_0 = [];
-            bits2_5 = [];
-            bits3_0 = [];
-            bits4_0 = [];
-            bits5_0 = [];
-            bitscfg = [];
-            bitsmsg = [];
-            bugcodes = [];
-            cderr = [];
-            cfg = [];
-            cfgmgr32 = [];
-            cguid = [];
-            combaseapi = [];
-            coml2api = [];
-            commapi = [];
-            commctrl = [];
-            commdlg = [];
-            commoncontrols = [];
-            consoleapi = [];
-            corsym = [];
-            d2d1 = [];
-            d2d1_1 = [];
-            d2d1_2 = [];
-            d2d1_3 = [];
-            d2d1effectauthor = [];
-            d2d1effects = [];
-            d2d1effects_1 = [];
-            d2d1effects_2 = [];
-            d2d1svg = [];
-            d2dbasetypes = [];
-            d3d = [];
-            d3d10 = [];
-            d3d10_1 = [];
-            d3d10_1shader = [];
-            d3d10effect = [];
-            d3d10misc = [];
-            d3d10sdklayers = [];
-            d3d10shader = [];
-            d3d11 = [];
-            d3d11_1 = [];
-            d3d11_2 = [];
-            d3d11_3 = [];
-            d3d11_4 = [];
-            d3d11on12 = [];
-            d3d11sdklayers = [];
-            d3d11shader = [];
-            d3d11tokenizedprogramformat = [];
-            d3d12 = [];
-            d3d12sdklayers = [];
-            d3d12shader = [];
-            d3d9 = [];
-            d3d9caps = [];
-            d3d9types = [];
-            d3dcommon = [];
-            d3dcompiler = [];
-            d3dcsx = [];
-            d3dx10core = [];
-            d3dx10math = [];
-            d3dx10mesh = [];
-            datetimeapi = [];
-            davclnt = [];
-            dbghelp = [];
-            dbt = [];
-            dcommon = [];
-            dcomp = [];
-            dcompanimation = [];
-            dcomptypes = [];
-            dde = [];
-            ddraw = [];
-            ddrawi = [];
-            ddrawint = [];
-            debug = [];
-            debugapi = [];
-            devguid = [];
-            devicetopology = [];
-            devpkey = [];
-            devpropdef = [];
-            dinput = [];
-            dinputd = [];
-            dmksctl = [];
-            dmusicc = [];
-            docobj = [];
-            documenttarget = [];
-            dpa_dsa = [];
-            dpapi = [];
-            dsgetdc = [];
-            dsound = [];
-            dsrole = [];
-            dvp = [];
-            dwmapi = [];
-            dwrite = [];
-            dwrite_1 = [];
-            dwrite_2 = [];
-            dwrite_3 = [];
-            dxdiag = [];
-            dxfile = [];
-            dxgi = [];
-            dxgi1_2 = [];
-            dxgi1_3 = [];
-            dxgi1_4 = [];
-            dxgi1_5 = [];
-            dxgi1_6 = [];
-            dxgidebug = [];
-            dxgiformat = [];
-            dxgitype = [];
-            dxva2api = [];
-            dxvahd = [];
-            endpointvolume = [];
-            errhandlingapi = [];
-            everything = [];
-            evntcons = [];
-            evntprov = [];
-            evntrace = [];
-            excpt = [];
-            exdisp = [];
-            fibersapi = [];
-            fileapi = [];
-            gl-gl = [];
-            guiddef = [];
-            handleapi = [];
-            heapapi = [];
-            hidclass = [];
-            hidpi = [];
-            hidsdi = [];
-            hidusage = [];
-            highlevelmonitorconfigurationapi = [];
-            hstring = [];
-            http = [];
-            imm = [];
-            impl-default = [];
-            in6addr = [];
-            inaddr = [];
-            inspectable = [];
-            interlockedapi = [];
-            intsafe = [];
-            ioapiset = [];
-            jobapi = [];
-            jobapi2 = [];
-            knownfolders = [];
-            ks = [];
-            ksmedia = [];
-            ktmtypes = [];
-            ktmw32 = [];
-            libloaderapi = [];
-            limits = [];
-            lmaccess = [];
-            lmalert = [];
-            lmapibuf = [];
-            lmat = [];
-            lmcons = [];
-            lmdfs = [];
-            lmerrlog = [];
-            lmjoin = [];
-            lmmsg = [];
-            lmremutl = [];
-            lmrepl = [];
-            lmserver = [];
-            lmshare = [];
-            lmstats = [];
-            lmsvc = [];
-            lmuse = [];
-            lmwksta = [];
-            lowlevelmonitorconfigurationapi = [];
-            lsalookup = [];
-            memoryapi = [];
-            minschannel = [];
-            minwinbase = [];
-            minwindef = [];
-            mmdeviceapi = [];
-            mmeapi = [];
-            mmreg = [];
-            mmsystem = [];
-            msaatext = [];
-            mscat = [];
-            mschapp = [];
-            mssip = [];
-            mstcpip = [];
-            namedpipeapi = [];
-            namespaceapi = [];
-            nb30 = [];
-            ncrypt = [];
-            ntddscsi = [];
-            ntddser = [];
-            ntdef = [];
-            ntlsa = [];
-            ntsecapi = [];
-            ntstatus = [];
-            oaidl = [];
-            objbase = [];
-            objidl = [];
-            objidlbase = [];
-            ocidl = [];
-            ole2 = [];
-            oleauto = [];
-            olectl = [];
-            oleidl = [];
-            opmapi = [];
-            pdh = [];
-            perflib = [];
-            physicalmonitorenumerationapi = [];
-            playsoundapi = [];
-            powerbase = [];
-            powersetting = [];
-            powrprof = [];
-            processenv = [];
-            processsnapshot = [];
-            processthreadsapi = [];
-            processtopologyapi = [];
-            profileapi = [];
-            propidl = [];
-            propkeydef = [];
-            propsys = [];
-            prsht = [];
-            psapi = [];
-            qos = [];
-            realtimeapiset = [];
-            reason = [];
-            restartmanager = [];
-            restrictederrorinfo = [];
-            rmxfguid = [];
-            roapi = [];
-            robuffer = [];
-            roerrorapi = [];
-            rpc = [];
-            rpcdce = [];
-            rpcndr = [];
-            sapi = [];
-            sapi51 = [];
-            sapi53 = [];
-            sapiddk = [];
-            sapiddk51 = [];
-            schannel = [];
-            sddl = [];
-            securityappcontainer = [];
-            securitybaseapi = [];
-            servprov = [];
-            setupapi = [];
-            shellapi = [];
-            shellscalingapi = [];
-            shlobj = [];
-            shobjidl = [];
-            shobjidl_core = [];
-            shtypes = [];
-            spapidef = [];
-            sporder = [];
-            sql = [];
-            sqlext = [];
-            sqltypes = [];
-            sqlucode = [];
-            sspi = [];
-            std = [];
-            stralign = [];
-            stringapiset = [];
-            strmif = [];
-            subauth = [];
-            synchapi = [];
-            sysinfoapi = [];
-            systemtopologyapi = [];
-            textstor = [];
-            threadpoolapiset = [];
-            threadpoollegacyapiset = [];
-            timeapi = [];
-            timezoneapi = [];
-            tlhelp32 = [];
-            transportsettingcommon = [];
-            tvout = [];
-            unknwnbase = [];
-            urlhist = [];
-            urlmon = [];
-            usb = [];
-            usbiodef = [];
-            usbspec = [];
-            userenv = [];
-            usp10 = [];
-            utilapiset = [];
-            uxtheme = [];
-            vadefs = [];
-            vcruntime = [];
-            vsbackup = [];
-            vss = [];
-            vsserror = [];
-            vswriter = [];
-            wct = [];
-            werapi = [];
-            winbase = [];
-            wincodec = [];
-            wincodecsdk = [];
-            wincon = [];
-            wincred = [];
-            wincrypt = [];
-            windef = [];
-            windowsceip = [];
-            windowsx = [];
-            winefs = [];
-            winerror = [];
-            winevt = [];
-            wingdi = [];
-            winhttp = [];
-            wininet = [];
-            winineti = [];
-            winioctl = [];
-            winnetwk = [];
-            winnls = [];
-            winnt = [];
-            winreg = [];
-            winsafer = [];
-            winscard = [];
-            winsmcrd = [];
-            winsock2 = [];
-            winspool = [];
-            winstring = [];
-            winsvc = [];
-            winusb = [];
-            winusbio = [];
-            winuser = [];
-            winver = [];
-            wmistr = [];
-            wnnc = [];
-            wow64apiset = [];
-            ws2def = [];
-            ws2ipdef = [];
-            ws2spi = [];
-            ws2tcpip = [];
-            wtypes = [];
-            wtypesbase = [];
-            xinput = [];
-          };
-          target = {
-            i686-pc-windows-gnu = {
-              dependencies = {
-                winapi-i686-pc-windows-gnu = {
-                  version = "0.4";
-                };
-              };
-            };
-            x86_64-pc-windows-gnu = {
-              dependencies = {
-                winapi-x86_64-pc-windows-gnu = {
-                  version = "0.4";
-                };
-              };
-            };
-          };
-          badges = {
-            appveyor = {
-              branch = "0.3";
-              repository = "retep998/winapi-rs";
-              service = "github";
-            };
-            travis-ci = {
-              branch = "0.3";
-              repository = "retep998/winapi-rs";
-            };
-          };
-        };
-      };
-      "registry+https://github.com/rust-lang/crates.io-index".winapi-i686-pc-windows-gnu."0.4.0" = mkRustCrate {
-        package-id = "winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)";
-        src = config.resolver {
-          source = "registry+https://github.com/rust-lang/crates.io-index";
-          name = "winapi-i686-pc-windows-gnu";
-          version = "0.4.0";
-          sha256 = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6";
-          source-info = {
-            index = "registry+https://github.com/rust-lang/crates.io-index";
-          };
-        };
-        dependencies = [];
-        cargo-manifest = {
-          package = {
-            name = "winapi-i686-pc-windows-gnu";
-            version = "0.4.0";
-            authors = [
-              "Peter Atashian <retep998@gmail.com>"
-            ];
-            build = "build.rs";
-            include = [
-              "src/*"
-              "lib/*"
-              "Cargo.toml"
-              "build.rs"
-            ];
-            description = "Import libraries for the i686-pc-windows-gnu target. Please don't use this crate directly, depend on winapi instead.";
-            keywords = [
-              "windows"
-            ];
-            license = "MIT/Apache-2.0";
-            repository = "https://github.com/retep998/winapi-rs";
-          };
-        };
-      };
-      "registry+https://github.com/rust-lang/crates.io-index".winapi-x86_64-pc-windows-gnu."0.4.0" = mkRustCrate {
-        package-id = "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)";
-        src = config.resolver {
-          source = "registry+https://github.com/rust-lang/crates.io-index";
-          name = "winapi-x86_64-pc-windows-gnu";
-          version = "0.4.0";
-          sha256 = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f";
-          source-info = {
-            index = "registry+https://github.com/rust-lang/crates.io-index";
-          };
-        };
-        dependencies = [];
-        cargo-manifest = {
-          package = {
-            name = "winapi-x86_64-pc-windows-gnu";
-            version = "0.4.0";
-            authors = [
-              "Peter Atashian <retep998@gmail.com>"
-            ];
-            build = "build.rs";
-            include = [
-              "src/*"
-              "lib/*"
-              "Cargo.toml"
-              "build.rs"
-            ];
-            description = "Import libraries for the x86_64-pc-windows-gnu target. Please don't use this crate directly, depend on winapi instead.";
-            keywords = [
-              "windows"
-            ];
-            license = "MIT/Apache-2.0";
-            repository = "https://github.com/retep998/winapi-rs";
-          };
-        };
-      };
-      sources = [
-        "registry+https://github.com/rust-lang/crates.io-index"
-        "unknown"
-      ];
-    }))
\ No newline at end of file
diff --git a/nix/sources.json b/nix/sources.json
new file mode 100644
index 0000000..aa8e4ab
--- /dev/null
+++ b/nix/sources.json
@@ -0,0 +1,51 @@
+{
+    "cargo2nix": {
+        "branch": "master",
+        "description": "Build Rust crates effortlessly with Nix",
+        "homepage": "",
+        "owner": "tenx-tech",
+        "repo": "cargo2nix",
+        "rev": "5c461f02688f59f5c7efba80f61b62a827ccf1d3",
+        "sha256": "14dsx802mjzjjfb6nhsqj33f9p0l1vk5wjrzjm3yiffxab1j6d3b",
+        "type": "tarball",
+        "url": "https://github.com/tenx-tech/cargo2nix/archive/5c461f02688f59f5c7efba80f61b62a827ccf1d3.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz",
+        "version": "v0.8.2"
+    },
+    "niv": {
+        "branch": "master",
+        "description": "Easy dependency management for Nix projects",
+        "homepage": "https://github.com/nmattia/niv",
+        "owner": "nmattia",
+        "repo": "niv",
+        "rev": "f73bf8d584148677b01859677a63191c31911eae",
+        "sha256": "0jlmrx633jvqrqlyhlzpvdrnim128gc81q5psz2lpp2af8p8q9qs",
+        "type": "tarball",
+        "url": "https://github.com/nmattia/niv/archive/f73bf8d584148677b01859677a63191c31911eae.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "nixpkgs": {
+        "branch": "nixos-19.09",
+        "description": "A read-only mirror of NixOS/nixpkgs tracking the released channels. Send issues and PRs to",
+        "homepage": "https://github.com/NixOS/nixpkgs",
+        "owner": "NixOS",
+        "repo": "nixpkgs-channels",
+        "rev": "9237a09d8edbae9951a67e9a3434a07ef94035b7",
+        "sha256": "05bizymljzzd665bpsjbhxamcgzq7bkjjzjfapkl2nicy774ak4x",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs-channels/archive/9237a09d8edbae9951a67e9a3434a07ef94035b7.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "nixpkgsMozilla": {
+        "branch": "master",
+        "description": "mozilla related nixpkgs (extends nixos/nixpkgs repo)",
+        "homepage": null,
+        "owner": "mozilla",
+        "repo": "nixpkgs-mozilla",
+        "rev": "e912ed483e980dfb4666ae0ed17845c4220e5e7c",
+        "sha256": "08fvzb8w80bkkabc1iyhzd15f4sm7ra10jn32kfch5klgl0gj3j3",
+        "type": "tarball",
+        "url": "https://github.com/mozilla/nixpkgs-mozilla/archive/e912ed483e980dfb4666ae0ed17845c4220e5e7c.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    }
+}
diff --git a/nix/sources.nix b/nix/sources.nix
new file mode 100644
index 0000000..45c97d1
--- /dev/null
+++ b/nix/sources.nix
@@ -0,0 +1,135 @@
+# This file has been generated by Niv.
+
+let
+
+  #
+  # The fetchers. fetch_<type> fetches specs of type <type>.
+  #
+
+  fetch_file = pkgs: spec:
+    if spec.builtin or true then
+      builtins_fetchurl { inherit (spec) url sha256; }
+    else
+      pkgs.fetchurl { inherit (spec) url sha256; };
+
+  fetch_tarball = pkgs: name: spec:
+    let
+      ok = str: ! builtins.isNull (builtins.match "[a-zA-Z0-9+-._?=]" str);
+      # sanitize the name, though nix will still fail if name starts with period
+      name' = stringAsChars (x: if ! ok x then "-" else x) "${name}-src";
+    in
+      if spec.builtin or true then
+        builtins_fetchTarball { name = name'; inherit (spec) url sha256; }
+      else
+        pkgs.fetchzip { name = name'; inherit (spec) url sha256; };
+
+  fetch_git = spec:
+    builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; };
+
+  fetch_builtin-tarball = name: throw
+    ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
+        $ niv modify ${name} -a type=tarball -a builtin=true'';
+
+  fetch_builtin-url = name: throw
+    ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`.
+        $ niv modify ${name} -a type=file -a builtin=true'';
+
+  #
+  # Various helpers
+  #
+
+  # The set of packages used when specs are fetched using non-builtins.
+  mkPkgs = sources:
+    let
+      sourcesNixpkgs =
+        import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) {};
+      hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath;
+      hasThisAsNixpkgsPath = <nixpkgs> == ./.;
+    in
+      if builtins.hasAttr "nixpkgs" sources
+      then sourcesNixpkgs
+      else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then
+        import <nixpkgs> {}
+      else
+        abort
+          ''
+            Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or
+            add a package called "nixpkgs" to your sources.json.
+          '';
+
+  # The actual fetching function.
+  fetch = pkgs: name: spec:
+
+    if ! builtins.hasAttr "type" spec then
+      abort "ERROR: niv spec ${name} does not have a 'type' attribute"
+    else if spec.type == "file" then fetch_file pkgs spec
+    else if spec.type == "tarball" then fetch_tarball pkgs name spec
+    else if spec.type == "git" then fetch_git spec
+    else if spec.type == "builtin-tarball" then fetch_builtin-tarball name
+    else if spec.type == "builtin-url" then fetch_builtin-url name
+    else
+      abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
+
+  # Ports of functions for older nix versions
+
+  # a Nix version of mapAttrs if the built-in doesn't exist
+  mapAttrs = builtins.mapAttrs or (
+    f: set: with builtins;
+    listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
+  );
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
+  range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1);
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
+  stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
+  stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
+  concatStrings = builtins.concatStringsSep "";
+
+  # fetchTarball version that is compatible between all the versions of Nix
+  builtins_fetchTarball = { url, name, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchTarball;
+    in
+      if lessThan nixVersion "1.12" then
+        fetchTarball { inherit name url; }
+      else
+        fetchTarball attrs;
+
+  # fetchurl version that is compatible between all the versions of Nix
+  builtins_fetchurl = { url, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchurl;
+    in
+      if lessThan nixVersion "1.12" then
+        fetchurl { inherit url; }
+      else
+        fetchurl attrs;
+
+  # Create the final "sources" from the config
+  mkSources = config:
+    mapAttrs (
+      name: spec:
+        if builtins.hasAttr "outPath" spec
+        then abort
+          "The values in sources.json should not have an 'outPath' attribute"
+        else
+          spec // { outPath = fetch config.pkgs name spec; }
+    ) config.sources;
+
+  # The "config" used by the fetchers
+  mkConfig =
+    { sourcesFile ? ./sources.json
+    , sources ? builtins.fromJSON (builtins.readFile sourcesFile)
+    , pkgs ? mkPkgs sources
+    }: rec {
+      # The sources, i.e. the attribute set of spec name to spec
+      inherit sources;
+
+      # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
+      inherit pkgs;
+    };
+in
+mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }
diff --git a/nixpkgs.nix b/nixpkgs.nix
deleted file mode 100644
index 6a8570c..0000000
--- a/nixpkgs.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-{ ... }@args:
-import
-  (fetchGit {
-    url = https://github.com/NixOS/nixpkgs;
-    rev = "47b551c6a854a049045455f8ab1b8750e7b00625";
-  })
-  (args // {
-    config.packageOverrides = pkgs: {
-      openssl = (pkgs.openssl.override {
-        # `perl` is only used at build time, but the derivation incorrectly uses host `perl`
-        # as an input.
-        perl = pkgs.buildPackages.buildPackages.perl;
-      }).overrideAttrs (_: {
-        # `man` output is troublesome, disable it.
-        installTargets = "install_sw";
-        outputs = [ "bin" "dev" "out" ];
-      });
-
-      # These packages need rebuilding because of the harmless `openssl` change above.
-      # The test suites for them fails (for some reason) so just disable them.
-      libuv = pkgs.libuv.overrideAttrs (_: { doCheck = false; });
-      e2fsprogs = pkgs.e2fsprogs.overrideAttrs (_: { doCheck = false; });
-    };
-  })
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..d9ccb32
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1 @@
+with import ./. { crossSystem = null; }; shell