gentoo-overlay/games-strategy/naev/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>games</herd>
<use>
	<flag name="mixer">
		Enables <pkg>media-libs/sdl-mixer</pkg> sound backend in addition to
		<pkg>media-libs/openal</pkg> one.
	</flag>
</use>
</pkgmetadata>