/usr/share/doc/libnss-libvirt/changelog.Debian.gz is in libnss-libvirt 4.0.0-1ubuntu8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libnss-libvirt/../libvirt0/changelog.Debian.gz
/usr/share/doc/libnss-libvirt/../libvirt0/changelog.Debian.gz