anchor.diff:  
   let
     majorVersion = "0";
  -  minorVersion = "224";
  +  minorVersion = "225";
   
     desktopItem = makeDesktopItem {
       name = "MAME";
  
positive.code:     owner = "mamedev";
      repo = "mame";
      rev = "mame${majorVersion}${minorVersion}";
      sha256 = "1z012fk7nlvxxixxcavmzc9443xli6i7xzz7fdf755g7v1cys7im";
    };
  
    hardeningDisable = [ "fortify" ];
  
negative.code: { stdenv, mkDerivation, fetchFromGitHub, makeDesktopItem, makeWrapper
  , python, pkgconfig, SDL2, SDL2_ttf, alsaLib, which, qtbase, libXinerama
  , libpcap, CoreAudioKit, ForceFeedback
  , installShellFiles }:
  