anchor.diff:    framework = name: deps: stdenv.mkDerivation {
       name = "apple-framework-${name}";
   
  -    phases = [ "installPhase" "fixupPhase" ];
  +    dontUnpack = true;
   
       # because we copy files from the system
       preferLocalBuild = true;
  
positive.code: 
      Xplugin = stdenv.mkDerivation {
        name   = "apple-lib-Xplugin";
        phases = [ "installPhase" "fixupPhase" ];
  
        # Not enough
        __propagatedImpureHostDeps = [ "/usr/lib/libXplugin.1.dylib" ];
  
negative.code: 
      utmp = stdenv.mkDerivation {
        name   = "apple-lib-utmp";
        dontUnpack = true;
  
        installPhase = ''
          mkdir -p $out/include
  