anchor.diff:    '';
   
     meta = with stdenv.lib; {
  +    version = "0.12.0";
       description = "A media player that supports many video formats (MPlayer and mplayer2 fork)";
       homepage = http://mpv.io;
       license = licenses.gpl2Plus;
  
positive.code: , vaapiSupport ? false, libva ? null
  }:
  
  # TODO: Wayland support
  # TODO: investigate caca support
  # TODO: investigate lua5_sockets bug
  
  assert x11Support -> (libX11 != null && libXext != null && mesa != null && libXxf86vm != null);
  assert xineramaSupport -> (libXinerama != null && x11Support);
  assert xvSupport -> (libXv != null && x11Support);
  
negative.code:     '';
    };
  }
  # TODO: Wayland support
  # TODO: investigate caca support
  # TODO: investigate lua5_sockets bug
  