calculate-overlay/app-emulation/virt-manager/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>virtualization@gentoo.org</email>
    <name>Gentoo Virtualization Project</name>
  </maintainer>
  <use>
    <flag name="policykit">
      Enables <pkg>sys-auth/polkit</pkg> authentication support,
      required when using <pkg>app-emulation/libvirt</pkg> with
      PolicyKit authentication
    </flag>
    <flag name="sasl">
      Depend on the proper libraries needed to connect to SASL-enabled
      libvirtd instances (e.g. Kerberos-protected instances).
    </flag>
  </use>
</pkgmetadata>