gentoo-overlay/app-emacs/mu-cite/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer type="project">
  <email>gnu-emacs@gentoo.org</email>
  <name>Gentoo GNU Emacs project</name>
</maintainer>
<maintainer type="project">
  <email>cjk@gentoo.org</email>
  <name>Cjk</name>
</maintainer>
<stabilize-allarches/>
<use>
  <flag name="bbdb">Include support for <pkg>app-emacs/bbdb</pkg></flag>
</use>
</pkgmetadata>