So you're having some trouble with your NixOS install. Well, here are the steps that finally worked for me:
- Limit system closure
It's not clear if some packages were actually broken, my system was incapable of reproducing them, or if the amount of packages was the problem. However, all of these can be worked around by removing any unnecessary programs, services, and configuration from the system. I did this in my configuration by disabling all of the programs and features not required for a barebones system to boot with my user account: