gentoo-ebuilds/dev-vcs/cvs/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <!-- maintainer-needed -->
  <use>
    <flag name="server">Enable server support</flag>
  </use>
  <upstream>
    <remote-id type="savannah">cvs</remote-id>
  </upstream>
</pkgmetadata>