I entered the lobby from hardware and saw it across the room, the quest where you get the timer to evade it won’t start until it sees me, but I have no way to evade or fight it (out of ammo, was trying to get to office to make some)
Edit: I forgot the Nightmare is dumb af, I tossed a lure and was able to make some pistol ammo to startle it with and just sat under a table.