diff --git a/flake.nix b/flake.nix
index 166c02b..06f2c9d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -19,7 +19,7 @@
     ...
   } @ inputs: let
     no_system_outputs = {
-      poetryOverrides = import ./poetryOverrides.nix;
+      lib.poetryOverrides = import ./lib/poetryOverrides.nix;
     };
 
     all_system_outputs = flake-utils.lib.eachDefaultSystem (system: let
diff --git a/poetryOverrides.nix b/lib/poetryOverrides.nix
similarity index 81%
rename from poetryOverrides.nix
rename to lib/poetryOverrides.nix
index b916f89..1a44d96 100644
--- a/poetryOverrides.nix
+++ b/lib/poetryOverrides.nix
@@ -43,9 +43,18 @@
       preferWheel = true;
     };
     libcst = prev.libcst.override {
-      # Missing rustc/cargo etc.
-      # buildInputs = (old.buildInputs or []) ++ [ final.setuptools-rust ];
       preferWheel = true;
+      #  }).overridePythonAttrs ( old: {
+      #      # This fix is incomplete, and appears to be due to the issue here:
+      #      # https://github.com/nix-community/poetry2nix/issues/413
+      #      # https://github.com/nix-community/poetry2nix/issues/442
+      #      buildInputs = (old.buildInputs or []) ++ [
+      #        pkgs.rustc
+      #        pkgs.cargo
+      #        # pkgs.rustPlatform.cargoSetupHook
+      #        final.setuptools-rust
+      #      ];
+      #    });
     };
     isort = prev.isort.override {
       # Some problem building due to a malformed semantic version string.
diff --git a/pkgs/python_ot/default.nix b/pkgs/python_ot/default.nix
index b980327..6f01c29 100644
--- a/pkgs/python_ot/default.nix
+++ b/pkgs/python_ot/default.nix
@@ -8,7 +8,7 @@
   ...
 }: let
   poetry2nix = inputs.poetry2nix.lib.mkPoetry2Nix {inherit pkgs;};
-  poetryOverrides = inputs.self.poetryOverrides {inherit pkgs;};
+  poetryOverrides = inputs.self.lib.poetryOverrides {inherit pkgs;};
 in
   poetry2nix.mkPoetryEnv {
     projectDir = ./.;