anchor.diff:      description = "Port of MAME ~2003+ to libretro";
       license = "MAME";
       makefile = "Makefile";
  +    enableParallelBuilding = false;
     };
   
     mame2010 = mkLibRetroCore {
  
positive.code:     description = "Port of MAME ~2003 to libretro";
      license = "MAME";
      makefile = "Makefile";
    };
  
    mame2003-plus = mkLibRetroCore {
  
negative.code:     src = getCoreSrc "mupen64plus";
      description = "Libretro port of Mupen64 Plus, GL only";
      license = lib.licenses.gpl3Only;
      extraBuildInputs = [ libGLU libGL libpng nasm xorg.libX11 ];
      makefile = "Makefile";
    };
  