1error:2 … while calling the 'head' builtin3 at «github:NixOS/nixpkgs/8c3cede7ddc26bd659d2d383b5610efbd2c7a16e?narHash=sha256-rppURzHviaQN131F%2BnLiLdGfcb0uCd9gGP0E5%2Biw9MI%3D»/lib/attrsets.nix:1712:13:4 1711| if length values == 1 || pred here (elemAt values 1) (head values) then5 1712| head values6 | ^7 1713| else89 … while evaluating the attribute 'optionalValue.value'10 at «github:NixOS/nixpkgs/8c3cede7ddc26bd659d2d383b5610efbd2c7a16e?narHash=sha256-rppURzHviaQN131F%2BnLiLdGfcb0uCd9gGP0E5%2Biw9MI%3D»/lib/modules.nix:1332:5:11 1331|12 1332| optionalValue = if isDefined then { value = mergedValue; } else { };13 | ^14 1333| };1516 … while evaluating definitions from `/nix/store/sdywslbm666h9iiald96x4kxzhdr5pmp-source/lib/make-disk-image.nix':1718 … while evaluating the option `system.build.toplevel':1920 … while evaluating definitions from `/nix/store/kxf3k5sdq5cbs13sm9w109p5m9lyzh7x-source/nixos/modules/system/activation/top-level.nix':2122 … while evaluating the option `assertions':2324 … while evaluating definitions from `/nix/store/sdywslbm666h9iiald96x4kxzhdr5pmp-source/module.nix':2526 (stack trace truncated; use '--show-trace' to show the full, detailed trace)2728 error: attribute 'assertions' missing29 at /var/lib/nixbot/worktrees/148-ce162c78ae82-e91c57a5/module.nix:247:7:30 246| assertions = lib.mkMerge [31 247| cfg.devices._config.assertions32 | ^33 248| [