gentoo-overlay/mate-extra/mate-power-manager/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
    <herd>mate</herd>
	<use>
		<flag name="applet">Enable building of the MATE applet.</flag>
		<flag name="man">Build power manager's man page.</flag>
		<flag name="unique">Enable single instance support using 
		<pkg>dev-libs/libunique</pkg>.</flag>
	</use>
    <upstream>
        <remote-id type="github">mate-desktop/mate-power-manager</remote-id>
    </upstream>
</pkgmetadata>