anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "arc-theme";
  -  version = "20190330";
  +  version = "20190910";
   
     src = fetchFromGitHub {
  -    owner  = "NicoHood";
  +    owner  = "arc-design";
       repo   = pname;
       rev    = version;
  -    sha256 = "16n5svgkpa8azxgyy64zwjjc04r57wfzkdq9igqvbvwkbvx8aa89";
  +    sha256 = "161kx9ii5ij1503nvhgn3pyqfj7cj03l1di2yf8kwwfczbi4mq3j";
     };
   
     nativeBuildInputs = [
  
positive.code: 
    enableParallelBuilding = true;
  
    postPatch = ''
      patchShebangs .
      # TODO: remove this after update
      ln -s 3.30 common/gnome-shell/3.32
    '';
  
    preBuild = ''
      # Shut up inkscape's warnings about creating profile directory
      export HOME="$NIX_BUILD_ROOT"
    '';
  
    configureFlags = [ "--disable-unity" ];
  
    postInstall = ''
      install -Dm644 -t $out/share/doc/${pname} AUTHORS *.md
    '';
  
    meta = with stdenv.lib; {
      description = "A flat theme with transparent elements for GTK 3, GTK 2 and Gnome-Shell";
      homepage    = https://github.com/NicoHood/arc-theme;
      license     = licenses.gpl3;
      maintainers = with maintainers; [ simonvandel romildo ];
      platforms   = platforms.linux;
  
negative.code:     optipng
      inkscape
      gtk3
    ];
  
    propagatedUserEnvPkgs = [
  