I use LXC containers a lot and am often snapshotting, restoring or cloning them. When this happens naturally they get a new MAC address and then I have to fiddle the fishd files around each time

Previously when the hostname was used this wasn't a problem with snapshotting but there were still issues with cloning a machine in which it will get a new hostname

I would like it if there were a way to configure a constant to use as the MACHINE_ID