anchor.diff:    libPath64 = lib.makeLibraryPath [
       gcc.cc gtk2 gdk_pixbuf glib mesa_glu postgresql nss nspr
       alsaLib GConf cups libcap fontconfig freetype pango
  -    cairo dbus expat zlib libpng12
  +    cairo dbus expat zlib libpng12 udev
       libX11 libXcursor libXdamage libXfixes libXrender libXi
       libXcomposite libXext libXrandr libXtst libSM libICE libxcb
     ];
  
positive.code: 
    outputs = [ "out" "monodevelop" ];
  
    unpackPhase = ''
      echo -e 'q\ny' | fakeroot sh $src
      sourceRoot="unity-editor-${pkgVer}"
    '';
  
    buildPhase = ''
  
negative.code: { stdenv, lib, fetchurl, makeWrapper, fakeroot, file, getopt
  , gtk2, gdk_pixbuf, glib, mesa_glu, postgresql, nss, nspr, udev
  , alsaLib, GConf, cups, libcap, fontconfig, freetype, pango
  , cairo, dbus, expat, zlib, libpng12, nodejs, gnutar, gcc, gcc_32bit
  , libX11, libXcursor, libXdamage, libXfixes, libXrender, libXi
  