Fix 'hdk' reference in integrity zome

flake.nix

@@ -1,37 +1,41 @@
 {
-  description = "Flake for Holochain app development";
+  description = "Holochain Development Env";
 
   inputs = {
-    holonix.url = "github:holochain/holonix?ref=main";
-    holonix.inputs.holochain.url = "github:holochain/holochain?ref=holochain-0.4.0-dev.18";
-
-    nixpkgs.follows = "holonix/nixpkgs";
-    flake-parts.follows = "holonix/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
   };
 
-  outputs = inputs@{ flake-parts, ... }: flake-parts.lib.mkFlake { inherit inputs; } {
-    systems = builtins.attrNames inputs.holonix.devShells;
-    perSystem = { inputs', pkgs, ... }: {
-      formatter = pkgs.nixpkgs-fmt;
+  outputs = { self, nixpkgs }:
+    let
+      system = "x86_64-linux";
+      pkgs = import ./pkgs.nix {
+        pkgs = nixpkgs.legacyPackages.${system};
+        inherit system;
+      };
+    in
+    {
+      devShells.${system} = {
+        default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            holochain_0-4
+            lair-keystore_0-4-5
+            hc_0-4
 
-      devShells.default = pkgs.mkShell {
-        inputsFrom = [ inputs'.holonix.devShells ];
+            rustup
+            cargo
+            rustc
 
-        packages = (with inputs'.holonix.packages; [
-          holochain
-          lair-keystore
-          hn-introspect
-          rust # For Rust development, with the WASM target included for zome builds
-        ]) ++ (with pkgs; [
-          nodejs_20 # For UI development
-          binaryen # For WASM optimisation
-          # Add any other packages you need here
-        ]);
+            nodejs_22
+          ];
 
-        shellHook = ''
-          export PS1='\[\033[1;34m\][holonix:\w]\$\[\033[0m\] '
-        '';
+          shellHook = ''
+            export PS1="\[\e[1;32m\](flake-env)\[\e[0m\] \[\e[1;34m\]\u@\h:\w\[\e[0m\]$ "
+              export CARGO_HOME=$(pwd)/.cargo
+              export RUSTUP_HOME=$(pwd)/.rustup
+            rustup default stable
+            rustup target add wasm32-unknown-unknown
+          '';
+        };
       };
     };
-  };
 }

pkgs.nix

@@ -3,8 +3,8 @@
 import (pkgs.fetchFromGitHub {
   owner = "spartan-holochain-counsel";
   repo = "nix-overlay";
-  rev = "9c0ed332596994faaacb35593a2d427f9ac38bf2";
-  sha256 = "E8dKMuhnd51Rh1tLud/asf/4TTFuZaIs0fZbe/rsUuQ=";
+  rev = "5bae4a38735d74633c9c089b5c896cb9631a295b";
+  sha256 = "E/FvMyUgEB5MYL+s46YSiHPOAJiurKZDMQy1oxak6bg=";
 }) {
   inherit pkgs;
   inherit system;

zomes/deepkey/src/utils.rs

@@ -12,7 +12,6 @@ use hdi_extensions::{
     guest_error,
 };
 use hdi::prelude::*;
-use hdk::prelude::debug;
 
 
 pub fn serialize<T>(target: &T) -> ExternResult<Vec<u8>>