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/icfb86vg6yf5kf8k927pmf8417zjc0li-source/tests/flake-module.nix, via option perSystem':

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

       error: Missing nix-unit tests for the following clan services on aarch64-darwin:
         - harmonia

       Every service in `clan.modules` must have a nix-unit test registered at
       `tests.systems.aarch64-darwin.<moduleName>`. See services/wifi for an example.