gentoo-overlay/net-misc/streamtuner/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>sound</herd>
  <use>
    <flag name="shout">Enable shoutcast plug-in.</flag>
    <flag name="xiph">Enable xiph.org plug-in.</flag>
  </use>
</pkgmetadata>