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/hqh4dp94r41rk0k4b9b6v804nrlwmij8-source/modules/transposition.nix':

       … while evaluating definitions from `/nix/store/n2xmnx2glw9y9varlbdwk86kk29fvh3v-source/lib/flake-parts/clan-nixos-test.nix':

       … while evaluating the option `_module.check':

       … while evaluating definitions from `/nix/store/n2xmnx2glw9y9varlbdwk86kk29fvh3v-source/lib/clanTest/flake-module.nix, via option flake.modules.nixosTest.clanTest':

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

       error: clan.test.useContainers = true: clan machines live on `containers.<name>`,
       not `nodes.<name>`.

       Rename every `nodes.<name> = {...}` to `containers.<name> = {...}` in this
       test, and update any `config.nodes.*` references in testScript to
       `config.containers.*`.

       Offending node name(s): server