sdl-sound-dev.tcz
   sdl-sound.tcz
      SDL.tcz
         libmad.tcz
      libvorbis.tcz
         libogg.tcz
   SDL-dev.tcz
      SDL.tcz
         libmad.tcz
      libmad-dev.tcz
         libmad.tcz
   libvorbis-dev.tcz
      libvorbis.tcz
         libogg.tcz
      libogg-dev.tcz
         libogg.tcz