{
  outputs = { self, nixpkgs, flake-utils }: flake-utils.lib.eachDefaultSystem (system:
  let
    pkgs = import nixpkgs { inherit system; };
    flakePkgs = rec {
      gerby = pkgs.callPackage ./nix/gerby.nix {};
    };
  in {
    packages = flake-utils.lib.flattenTree flakePkgs;
    devShell = pkgs.mkShell {};
  });
}