Comment # 32 on bug 1123699 from James Fehlig

(In reply to Reinhard Max from comment #31)
> Looking at systemd.special(7), I think nss-lookup.target would be a more
> appropriate synchronisation point for this.

Thanks for the pointer! And I agree with your suggestion. If anyone listening
can reliably reproduce the bug and is willing to test, package are available in
my home project

https://download.opensuse.org/repositories/home:/jfehlig:/branches:/Virtualization/openSUSE_Factory/

Or if you want to quickly hack your existing setup

diff -u /usr/lib/systemd/system/libvirtd.service.orig
/usr/lib/systemd/system/libvirtd.service
--- /usr/lib/systemd/system/libvirtd.service.orig       2019-06-03
16:39:20.076428868 -0600
+++ /usr/lib/systemd/system/libvirtd.service    2019-06-03 16:39:59.324788043
-0600
@@ -10,6 +10,7 @@
 Wants=systemd-machined.service
 Before=libvirt-guests.service
 After=network.target
+After=nss-lookup.target
 After=dbus.service
 After=iscsid.service
 After=apparmor.service