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

  outputs = { self, nixpkgs }: {
      packages.x86_64-linux.default = nixpkgs.legacyPackages.x86_64-linux.pkgs.stdenv.mkDerivation {
        name = "robots.txt";
        src = ./.;
        installPhase = ''
          mkdir -p $out
          cp robots.txt $out
        '';
      };
    };
}