When a service is added to or removed from the system configuration, polkit actions are not appropriately registered or unregistered. The policy files are added and deleted correctly but the polkitd process needs a SIGHUP afterwards to update the list of registered actions. Steps to reproduce: 1. Add (xfce-desktop-service) to (services) in config.scm. [Or any service which adds polkit actions] 2. Run guix system reconfigure. 3. Observe that the policy files are in place but not registered: $ ls /etc/polkit-1/actions/*xfce* /etc/polkit-1/actions/org.xfce.thunar.policy $ pkaction | grep -i xfce $ 4. Run killall -HUP polkitd 5. Observe that actions are registered. $ pkaction | grep -i xfce org.xfce.thunar