Lennart sez:
"Oh, I wasn't aware it is short-lived only. In that case, drop the
multi-user.target bit, and just make it create the dbus alias.
[Install]
Alias=dbus-org.freedesktop.nm-dispatcher.service
And yeah, adding Also=NetworkManager-dispatcher.service to
NetworkManager.service certainly would be a good idea."
ExecStart=@libexecdir@/nm-dispatcher.action
[Install]
-WantedBy=multi-user.target
Alias=dbus-org.freedesktop.nm-dispatcher.service
[Install]
WantedBy=multi-user.target
Alias=dbus-org.freedesktop.NetworkManager.service
+Also=NetworkManager-dispatcher.service