gentoo-overlay/app-backup/boxbackup/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<herd>app-backup</herd>
	<longdescription>An open source, completely automatic on-line backup
		system for UNIX.</longdescription>
	<use>
		<flag name='client-only'>Disable server support, and just build a
			client</flag>
	</use>
</pkgmetadata>