gentoo-overlay/net-im/teams/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="person">
    <email>dilfridge@gentoo.org</email>
    <name>Andreas K. Huettel</name>
  </maintainer>
  <use>
    <flag name="system-ffmpeg">Use the system-wide <pkg>media-video/ffmpeg</pkg> instead of bundled.</flag>
    <flag name="system-mesa">Use the system-wide <pkg>media-libs/mesa</pkg> instead of bundled.</flag>
  </use>
</pkgmetadata>