claude code in a nix devshell

claude.nix

{ pkgs, claude-code-tarball, claude-code-version }:
pkgs.stdenv.mkDerivation {
  name = "claude-code";
  version = claude-code-version;
  src = claude-code-tarball;
  dontConfigure = true;
  dontBuild = true;
  installPhase = ''
    mkdir -p $out/bin
    mkdir -p $out/lib/node_modules/@anthropic-ai/claude-code

    ls ${claude-code-tarball}
    cp -r ${claude-code-tarball}/* $out/lib/node_modules/@anthropic-ai/claude-code/

    cat > $out/bin/claude-code << EOF
    #!/bin/sh
    exec ${pkgs.nodejs}/bin/node $out/lib/node_modules/@anthropic-ai/claude-code/cli.js "\$@"
    EOF

    # Make the wrapper script executable
    chmod +x $out/bin/claude-code

    # Make the ripgrep binaries executable for all platforms
    chmod +x $out/lib/node_modules/@anthropic-ai/claude-code/vendor/ripgrep/*/rg*
  '';

  buildInputs = [ pkgs.nodejs ];
}

flake.nix

{
  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    claude-code-tarball = {
      url = "https://registry.npmjs.org/@anthropic-ai/claude-code/-/claude-code-0.2.45.tgz";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, flake-utils, claude-code-tarball }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
        };
        claude-code = import ./claude.nix {
          inherit pkgs claude-code-tarball;
          claude-code-version = "0.2.45";
        };
      in
      {
        devShells.default = pkgs.mkShell {
          packages = [
            claude-code
          ];
        };
      });
}

There might be some AI generated idiocy in here, I haven't scrutinized it much, but it does work.