anchor.diff:        sha256 = "sha256-bwnYkMvbtRF5bGZRYVtMWxnCu9P45qeX4+ntOj9eRds=";
       };
       description = "Port of Citra to libretro";
  -    license = gpl2Plus;
  +    license = lib.licenses.gpl2Plus;
       extraNativeBuildInputs = [ cmake pkg-config ];
       extraBuildInputs = [ libGLU libGL boost ];
       makefile = "Makefile";
  
positive.code:     core = "mednafen-psx";
      src = getCoreSrc "beetle-psx";
      description = "Port of Mednafen's PSX Engine core to libretro";
      license = gpl2;
      makefile = "Makefile";
      makeFlags = [ "HAVE_HW=0" "HAVE_LIGHTREC=1" ];
    };
  
negative.code:   play = mkLibRetroCore {
      core = "play";
      description = "Port of Play! to libretro";
      license = lib.licenses.bsd2;
      extraBuildInputs = [ boost ];
      extraNativeBuildInputs = [ cmake openssl curl icu libGL libGLU xorg.libX11 ];
      makefile = "Makefile";
  