gentoo-overlay/app-portage/g-sorcery/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<use>
		<flag name="bson">Support BSON file format for package DB</flag>
	</use>
	<maintainer type="project">
		<email>layman@gentoo.org</email>
		<name>Gentoo Layman team</name>
	</maintainer>
	<upstream>
		<remote-id type="github">jauhien/g-sorcery</remote-id>
	</upstream>
</pkgmetadata>