1574| || pred here (elemAt values 1) (head values) then
1575| head values
| ^
1576| else
… while evaluating the attribute 'value'
at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:809:9:
808| in warnDeprecation opt //
809| { value = builtins.addErrorContext "while evaluating the option `${showOption loc}':" value;
| ^
810| inherit (res.defsFinal') highestPrio;
(stack trace truncated; use '--show-trace' to show the full trace)
error: nixVersions.unstable has been removed. For bleeding edge (Nix master, roughly weekly updated) use nixVersions.git, otherwise use nixVersions.latest.
pkgs.nixUnstable seems deprecated, so use pkgs.nixVersions.latest instead.
otherwise the following error occurs during bootstrap0. https://github.com/mitchellh/nixos-config/issues/40