anchor.diff:                     ++ optional cddaSupport "--enable-cdda"
                      ;
   
  -  nativeBuildInputs = [ pkgconfig perl python which qttools makeWrapper ];
  +  nativeBuildInputs = [ pkgconfig perl python which qttools makeQtWrapper ];
   
     enableParallelBuilding = true;
   
  
positive.code:                   libvdpau
                    libva
                    libbluray
                    qtquickcontrols
                  ]
                  ++ optional jackSupport jack
  
negative.code: { stdenv, fetchurl, fetchFromGitHub, pkgconfig, perl, python, which, makeQtWrapper
  , libX11, libxcb, mesa
  , qtbase, qtdeclarative, qtquickcontrols, qttools, qtx11extras
  , ffmpeg
  