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/z8bni15xhz9qxxi9aarih0rydqqbbb7g-source/modules/transposition.nix':

       … while evaluating definitions from `/nix/store/gjyfx31fmx6qznxhjvqa7iwcfqy7kcqx-source/parts/ci.nix, via option perSystem':

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

       … while evaluating definitions from `/nix/store/4rwf9a42lpij7vhpwxjz8nzb3cpkf4zx-source/nixos/modules/system/activation/top-level.nix':

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

       error:
       Failed assertions:
       - The option definition `services.scx' in `/nix/store/gjyfx31fmx6qznxhjvqa7iwcfqy7kcqx-source/hosts/eientei/boot.nix' no longer has any effect; please remove it.
       Please migrate to services.scx-loader instead.