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/9iv83r72z5xwgylkwms1qip1ijnr6jqs-source/modules/transposition.nix':

       … while evaluating definitions from `/nix/store/qvz7q3jm878idfz0ngcc0ra2jbsr0419-source/flake.nix, via option perSystem':

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

       … while evaluating definitions from `/nix/store/mkp6xi3vnvrllpmc17337m6sci9chm5l-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `assertions':

       … while evaluating definitions from `/nix/store/mkp6xi3vnvrllpmc17337m6sci9chm5l-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services':

       … while evaluating definitions from `/nix/store/mkp6xi3vnvrllpmc17337m6sci9chm5l-source/nixos/modules/services/system/nix-daemon.nix':

       … while evaluating the option `nix.package':

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

       error: The option `nix.package' is defined multiple times while it's expected to be unique.

       Definition values:
       - In `/nix/store/qvz7q3jm878idfz0ngcc0ra2jbsr0419-source/nixosModules/repkgs.nix': <derivation nix-2.36pre20260912_203f85b2>
       - In `/nix/store/qvz7q3jm878idfz0ngcc0ra2jbsr0419-source/clanServices/tribuchet/default.nix, via option flake.clan._services.allServices.self-tribuchet.roles.hub.perInstance, via option nixosModule': <derivation nix-2.35.2+2>
       Use `lib.mkForce value` or `lib.mkDefault value` to change the priority on any of these definitions.