Thanks for the comment, that's very interesting! I'm not sure why, but my experience was different -- I think I was running `nixos-unstable` which wanted to query upstream for updates, which I felt necessary because Zoom on the `nixos-stable` was outdated and I needed to join a colleague's video calls.
Thanks for the link, I'll also post two that I saw when I was trying to work this out: - https://discourse.nixos.org/t/rebuild-nixos-offline/3679/4 - https://superuser.com/questions/1688845/nixos-how-to-fix-net...