docbook_xsl.tcz
   docbook_xml_dtd.tcz
   libxml2-dev.tcz
      libxml2.tcz
         liblzma.tcz
      liblzma-dev.tcz
         liblzma.tcz
   libxslt.tcz
      libgcrypt.tcz
         libgpg-error.tcz
      libxml2.tcz
         liblzma.tcz