anchor.diff:  , openjpeg, libopus, librsvg
   , wildmidi, fluidsynth, libvdpau, wayland
   , libwebp, xvidcore, gnutls
  -, mesa
  +, mesa, libintlOrEmpty
   }:
   
   assert faacSupport -> faac != null;
   
  +let
  +  inherit (stdenv.lib) optional optionalString;
  +in
   stdenv.mkDerivation rec {
     name = "gst-plugins-bad-1.4.5";
   
  
positive.code:       a real live maintainer, or some actual wide use.
      '';
      license     = licenses.lgpl2Plus;
      platforms   = platforms.linux;
      maintainers = with maintainers; [ iyzsong ];
    };
  
  
negative.code:     faad2 libass libkate libmms
      libmodplug mpeg2dec mpg123
      openjpeg libopus librsvg
      fluidsynth libvdpau
      libwebp xvidcore gnutls mesa
    ]
      ++ libintlOrEmpty
      ++ optional faacSupport faac
      ++ optional stdenv.isLinux wayland
      # wildmidi requires apple's OpenAL
      # TODO: package apple's OpenAL, fix wildmidi, include on Darwin
      ++ optional (!stdenv.isDarwin) wildmidi;
  
    LDFLAGS = optionalString stdenv.isDarwin "-lintl";
  }
  