gentoo-overlay/net-mail/postfix-logwatch/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer><email>mjo@gentoo.org</email></maintainer>
<use>
  <flag name='logwatch'>
    Install filters for use with <pkg>sys-apps/logwatch</pkg>.
  </flag>
</use>
</pkgmetadata>