wayland-dev.tcz
   wayland.tcz
      libffi.tcz
      expat2.tcz
      libxml2.tcz
         liblzma.tcz
   libffi-dev.tcz
      libffi.tcz
   expat2-dev.tcz
      expat2.tcz
   libxml2-dev.tcz
      libxml2.tcz
         liblzma.tcz
      liblzma-dev.tcz
         liblzma.tcz