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