gentoo-overlay/sys-freebsd/freebsd-lib/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>bsd</herd>
  <use>
    <flag name='hesiod'>Enable support for net-dns/hesiod</flag>
    <flag name='netware'>
      Build libraries and tools to work with NetWare protocols (IPX
      and NCP).
    </flag>
    <flag name='zfs'>Enable ZFS support.</flag>
  </use>
</pkgmetadata>