app-emacs/easypg/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>emacs</herd>
<use>
  <flag name='gnus'>Include support for the Gnus newsreader</flag>
</use>
</pkgmetadata>