{
  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 = ./.;
          buildPhase = ''
            bash generate.sh robots.txt
          '';
          installPhase = ''
            mkdir -p $out
            cp robots.txt $out
          '';
        };
        "src-quest" = nixpkgs.legacyPackages.x86_64-linux.pkgs.stdenv.mkDerivation {
          name = "robots.txt-src.quest";
          src = ./.;
          buildPhase = ''
            bash generate.sh robots.txt ./bases/src.quest
          '';
          installPhase = ''
            mkdir -p $out
            cp robots.txt $out
          '';
        };
      };
    };
}