gentoo-overlay/media-libs/clutter/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>gnome</herd>
<use>
	<flag name="gtk">Use gdk-pixbuf from <pkg>x11-libs/gtk+</pkg> as image rendering backend</flag>
	<flag name="introspection">Use <pkg>dev-libs/gobject-introspection</pkg> for
		introspection</flag>
</use>
</pkgmetadata>