anchor.diff:    name = "flashplayer-${src.version}";
   
     builder = ./builder.sh;
  -  
  +
     src = fetchurl { inherit (src) url sha256; };
   
     inherit zlib alsaLib;
  
positive.code: 
    rpath = stdenv.lib.makeLibraryPath
      [ zlib alsaLib curl nss nspr fontconfig freetype expat libX11
        libXext libXrender libXt gtk glib pango atk cairo gdk_pixbuf
      ];
  
    buildPhase = ":";
  
negative.code: , libX11
  , libXext
  , libXrender
  , libXcursor
  , libXt
  , gtk
  , glib
  , pango
  , cairo
  