Over the past couple of months I’ve upgraded two separate machines from Catalina to Big Sur. Both completed the installation, rebooted, then presented a scary error to the effect of “The installation failed, you need to wipe your entire disk and start again”.
As it turns out, rebooting & manually selecting the startup disk was enough to fix the error.
I’m curious how unlucky I have to be to have this happen twice though, and was wondering if the common factor was that both had nix installed using a separate volume (
sh <(curl -L https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume)
Have any other nix users upgrade from Catalina to Big Sur? Did you experience anything like this, or am I grasping at straws?