gentoo-overlay/app-emulation/virtualbox-modules/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer>
    <email>polynomial-c@gentoo.org</email>
    <name>Lars Wendler</name>
  </maintainer>
  <maintainer>
    <email>patrick@gentoo.org</email>
    <name>Patrick Lauer</name>
  </maintainer>
<use>
	<flag name="pax_kernel">Apply patch needed for pax enabled kernels</flag>
</use>
</pkgmetadata>