network vs network manager wait online

[Tom Horsley]

I was trying to change from NetworkManager to network on a fresh
install of f21 workstation, and it sort of works, but the boot
hangs for a long time with a start job running for NetworkManager
Wait Online.

There doesn't seem to be any service with a name like that that I can
disable.

How do I make this stop? (Shouldn't the wait online stuff be smart
enough to recognize NetworkManager is masked and avoid waiting)?