gentoo-overlay/dev-php/phing/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>php-bugs@gentoo.org</email>
    <name>PHP</name>
  </maintainer>
  <upstream>
    <remote-id type="github">phingofficial/phing</remote-id>
  </upstream>
  <use>
    <flag name="zip">
      Support zip archives by requiring said support in
      <pkg>dev-lang/php</pkg>.
    </flag>
  </use>
</pkgmetadata>