gentoo-overlay/app-cdr/cdemu/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer>
 <email>vanquirius@gentoo.org</email>
</maintainer>
<use>
<flag name='cdemud'>Pull <pkg>app-cdr/cdemud</pkg> dependency, useful in chroot environment (bug #315491). Do not disable until you know what you are doing.</flag>
</use>
</pkgmetadata>