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