anchor.diff:  
     buildInputs = [
       imagemagickBig
  -    python
  -    pygtk
       perl
       libX11
     ] ++ lib.optionals enableDbus [
  
positive.code: , enableDbus ? stdenv.isLinux
  }:
  
  let
    inherit (python2Packages) pygtk python;
  in
  stdenv.mkDerivation rec {
    pname = "zbar";
    version = "0.23";
  
    outputs = [ "out" "py" "lib" "dev" "doc" "man" ];
  
    src = fetchFromGitHub {
      owner = "mchehab";
  
negative.code:     "--disable-video"
      "--without-gtk"
      "--without-qt"
    ];
  
    meta = with lib; {
  