gentoo-overlay/sys-kernel/gentoo-sources/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer type="project">
  <email>kernel@gentoo.org</email>
  <name>Gentoo Kernel Project</name>
</maintainer>
<use>
  <flag name="experimental">Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".</flag>
</use>
<upstream>
  <remote-id type="cpe">cpe:/o:linux:linux_kernel</remote-id>
</upstream>
</pkgmetadata>