gentoo-overlay/media-libs/mesa-amber/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>x11@gentoo.org</email>
    <name>X11</name>
  </maintainer>
  <use>
    <flag name="gles1">Enable GLESv1 support.</flag>
    <flag name="wayland">Enable support for <pkg>dev-libs/wayland</pkg></flag>
  </use>
  <upstream>
    <remote-id type="cpe">cpe:/a:mesa3d:mesa</remote-id>
    <remote-id type="freedesktop-gitlab">mesa/mesa</remote-id>
  </upstream>
</pkgmetadata>