anchor.diff:  , alsa-lib
   , boost
   , buildPackages
  +, bzip2
   , cmake
   , curl
   , fetchFromGitHub
  
positive.code:     cmakeFlags = [
        "-DBUILD_LIBRETRO_CORE=ON"
      ];
      postPatch = "mkdir -p src/duckstation-libretro";
    };
  
    tgbdual = mkLibRetroCore {
  
negative.code:   };
  
    mesen-s = mkLibRetroCore {
      core = "mesen-s";
      description = "Port of Mesen-S to libretro";
      license = lib.licenses.gpl3Only;
      makefile = "Makefile";
      preBuild = "cd Libretro";
      normalizeCore = false;
    };
  
    meteor = mkLibRetroCore {
  