gentoo-overlay/app-arch/dpkg/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="person">
		<email>gyakovlev@gentoo.org</email>
		<name>Georgy Yakovlev</name>
	</maintainer>
	<use>
		<flag name="libmd">Use <pkg>app-crypt/libmd</pkg> library for message digest functions</flag>
		<flag name="update-alternatives">Install update-alternatives</flag>
	</use>
</pkgmetadata>