{
  description = "A bare minimum flake";

  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (sys:
      let pkgs = nixpkgs.legacyPackages.${sys};
          deps = [ pkgs.cowsay ];
          package = pkgs.writeScriptBin "program" "echo mjau | ${pkgs.cowsay}/bin/cowsay -f hellokitty";
      in rec {
        packages.default = package;
        devShells.default = pkgs.mkShell {
          packages = deps;
        };
      }
    );
}