error: the user '_nixbld1' in the group 'nixbld' does not exist - During rebuilds, uninstallation, and installation

[JackPala]

error: the user '_nixbld1' in the group 'nixbld' does not exist is the error I get during rebuilds, installs, uninstalls of Darwin.

Cause may have been an update

[emilazy]

This is a Nix issue with the Sequoia upgrade rather than a nix-darwin issue; see the command at the top of NixOS/nix#10892 for the fix.

If you’re using nix-darwin, it’d be a good idea to check if you’re getting updates, since we’ve had a warning for this deployed to users for a couple months now.