libwebp-dev.tcz
   libwebp.tcz
      libtiff.tcz
         liblzma.tcz
         libjpeg-turbo.tcz
      libpng.tcz
      giflib.tcz
   libtiff-dev.tcz
      libtiff.tcz
         liblzma.tcz
         libjpeg-turbo.tcz
      liblzma-dev.tcz
         liblzma.tcz
      libjpeg-turbo-dev.tcz
         libjpeg-turbo.tcz
   libpng-dev.tcz
      libpng-bin.tcz
         libpng.tcz
   giflib-dev.tcz
      giflib-bin.tcz
         giflib.tcz