{
  description = "Dev environment with Codex and CODEX_HOME set to the project root.";

  inputs = {
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs = { self, nixpkgs-unstable }:
    let
      systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
      forAllSystems = nixpkgs-unstable.lib.genAttrs systems;
    in
    {
      devShells = forAllSystems (system:
        let
          pkgs = import nixpkgs-unstable { inherit system; };
        in
        {
          default = pkgs.mkShell {
            packages = [
              pkgs.codex
            ];
            shellHook = ''
              export CODEX_HOME="/home/jawz/Development/gallery-organizer-web/.codex"
            '';
          };
        });
    };
}