Comment by craftkiller

> "nixos-rebuild switch" requires a working network, so a broken config leaves the system unable to fix itself – a catch-22

I just ran into this on an airplane! I'm relatively new to nixos (~4 weeks in) and I had configured my laptop to use DNS over TLS and DNSSEC, which is normally not a problem. But to get through those login gateways for the wifi, you need to disable all of that so they can MitM your DNS requests. "Thats no problem, everything is already in my nix store so I should be able to comment out those lines and run a nixos-rebuild" I thought to myself, but alas I was wrong. I'm sure I could have worked through it with enough persistence but it was a short enough flight that I decided to just wait until I landed to continue my otherwise wonderful journey into the nix.