anchor.diff:  
     preferLocalBuild = true;
   
  -  configureFlags = [ "--disable-unity" ];
  +  configureFlags = [ "--disable-unity" "--with-gnome=${gnomeVersion}" ];
   
     postInstall = ''
       mkdir -p $out/share/plank/themes
  
positive.code: { stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, gnome3, gtk-engine-murrine }:
  
  stdenv.mkDerivation rec {
    name = "${pname}-${version}";
    pname = "arc-theme";
    version = "2017-05-12";
  
    src = fetchFromGitHub {
      owner = "horst3180";
      repo = pname;
      rev = "8290cb813f157a22e64ae58ac3dfb5983b0416e6";
      sha256 = "1lxiw5iq9n62xzs0fks572c5vkz202jigndxaankxb44wcgn9zyf";
    };
  
  
negative.code: 
    meta = with stdenv.lib; {
      description = "A flat theme with transparent elements for GTK 3, GTK 2 and Gnome-Shell";
      homepage    = https://github.com/horst3180/arc-theme;
      license     = licenses.gpl3;
      maintainers = with maintainers; [ simonvandel romildo ];
      platforms   = platforms.unix;
    };
  }
  