{
  description = "Python development environment";
  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
  outputs = { nixpkgs, ... }: let
    system = "x86_64-linux";
    pkgs = import nixpkgs {
      inherit system;
      config.allowUnfree = true;
    };
  in {
    devShells."${system}".default = pkgs.mkShell {
      packages = with pkgs; [
        (python312.withPackages (
          ppkgs: [
            python312Packages.django
            python312Packages.psycopg2
          ]
        ))
        # other packages
      ];

      shellHook = ''
        echo "Welcome to your declarative Python development environment!"
        python --version
      '';
    };
  };
}