They're cold. They don't like to fly if it's below 50. When it's cold like that, I've pulled the queen cage out and put it between frames in a super. I then remove enough frames to fit the package box (feeder can removed) in a deep next to the frames where the queen cage is located. They'll head towards her smell and abandon the package without much confusion and cluster without getting caught in the cold. It takes more time to hive but works better for colder weather.
Unfortunately this doesn't help you in this situation.