gentoo-overlay/media-sound/alsa-utils/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>alsa</herd>
  <maintainer>
    <email>alsa-bugs@gentoo.org</email>
  </maintainer>
  <use>
    <flag name="bat">install basic audio tester (BAT) util</flag>
    <flag name="libsamplerate">install utils that use libsamplerate (e.g. alsaloop)</flag>
    <flag name="ncurses">install utils that use ncurses (e.g. alsamixer)</flag>
  </use>
</pkgmetadata>