anchor.diff:  assert cddaSupport -> libcdda != null;
   assert youtubeSupport -> youtube-dl != null;
   
  -let qtPath = makeSearchPath "lib/qt5/qml" [ qtdeclarative qtquickcontrols ];
  -in
  -
   stdenv.mkDerivation rec {
     name = "bomi-${version}";
     version = "0.9.11";
  
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
  