gentoo-overlay/app-i18n/ibus-handwrite/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>cjk@gentoo.org</email>
    <name>Cjk</name>
  </maintainer>
  <use>
    <flag name="zinnia">Enable support for <pkg>app-i18n/zinnia</pkg></flag>
  </use>
</pkgmetadata>