gentoo-overlay/net-firewall/firewalld/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="project">
		<email>virtualization@gentoo.org</email>
		<name>Gentoo Virtualization Project</name>
	</maintainer>
	<use>
		<flag name="nftables">Add support for <pkg>net-firewall/nftables</pkg> as firewall backend</flag>
		<flag name="iptables">Add support for <pkg>net-firewall/nftables</pkg> as firewall backend</flag>
	</use>
</pkgmetadata>