error:
       … while evaluating a branch condition
         at «string»:25:5:
           24|     v:
           25|     if !builtins.isAttrs v || isDrv v then
             |     ^
           26|       v

       … in the left operand of the OR (||) operator
         at «string»:25:28:
           24|     v:
           25|     if !builtins.isAttrs v || isDrv v then
             |                            ^
           26|       v

       … while evaluating definitions from `/nix/store/s0fpxz3rvfip9bc50wfmwpigxiyl6nkg-source/modules/transposition.nix':

       … while evaluating definitions from `/nix/store/nyqjzb4ifjiavwh52y9fbf7x2r6qard0-source/checks/flake-module.nix, via option perSystem':

       … while evaluating the option `system.build.toplevel':

       … while evaluating definitions from `/nix/store/psk67z2p5aigw7hb8866hwir1rkdn8vl-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `assertions':

       … while evaluating definitions from `/nix/store/s154mmk8ahvc71gq8xfkbzlk240yvniv-source/modules/sops':

       … while evaluating the option `sops.secrets':

       … while evaluating definitions from `/nix/store/7b7lgxwmz8k65xwhjhs9sxxqhdrszs1v-source/nixosModules/clanCore/vars/secret/sops':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: The option `clan.core.vars.generators.chris-mail.migrateFact' does not exist. Definition values:
       - In `/nix/store/nyqjzb4ifjiavwh52y9fbf7x2r6qard0-source/modules/mailserver.nix': "chris-mail"

       Did you mean `clan.core.vars.generators.chris-mail.files', `clan.core.vars.generators.chris-mail.finalScript' or `clan.core.vars.generators.chris-mail.name'?