anchor.diff:  
   in stdenv.mkDerivation rec {
     pname = "mpv";
  -  version = "0.32.0";
  +  version = "0.33.0";
   
     src = fetchFromGitHub {
       owner  = "mpv-player";
       repo   = "mpv";
       rev    = "v${version}";
  -    sha256 = "0kmy1q0hp87vq4rpv7py04x8bpg1wmlzaibavmkf713jqp6qy596";
  +    sha256 = "sha256-3l32qQBpvWVjbLp5CZtO039oDQeH7C/cNAKtJxrzlRk=";
     };
   
     postPatch = ''
  
positive.code: assert pulseSupport       -> available libpulseaudio;
  assert rubberbandSupport  -> available rubberband;
  assert screenSaverSupport -> available libXScrnSaver;
  assert sambaSupport       -> available samba;
  assert sdl2Support        -> available SDL2;
  assert sndioSupport       -> available sndio;
  assert speexSupport       -> available speex;
  assert theoraSupport      -> available libtheora;
  assert vaapiSupport       -> available libva;
  
negative.code: , libpngSupport      ? true,           libpng        ? null
  , pulseSupport       ? config.pulseaudio or stdenv.isLinux, libpulseaudio ? null
  , rubberbandSupport  ? stdenv.isLinux, rubberband    ? null
  , screenSaverSupport ? true,           libXScrnSaver ? null
  , sdl2Support        ? true,           SDL2          ? null
  , speexSupport       ? true,           speex         ? null
  , swiftSupport       ? false,          swift         ? null
  , theoraSupport      ? true,           libtheora     ? null
  