gentoo-overlay/mate-base/mate-applets-meta/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="project">
		<email>mate@gentoo.org</email>
		<name>Gentoo MATE Desktop</name>
	</maintainer>
	<use>
		<flag name="appindicator">Pull in <pkg>mate-extra/mate-indicator-applet</pkg>
			for AppIndicator applet</flag>
		<flag name="sensors">Pull in <pkg>mate-extra/mate-sensors-applet</pkg>
			for hw sensors applet</flag>
	</use>
</pkgmetadata>