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/cj286gmwc3g9yw8hwqlf5ippvsrylhlp-source/flake.nix, via option perSystem':

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

       … while evaluating definitions from `/nix/store/77pwkvplpva96ymzibi6pafkil36w5qn-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `warnings':

       … while evaluating definitions from `/nix/store/77pwkvplpva96ymzibi6pafkil36w5qn-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services.knot.serviceConfig':

       … while evaluating definitions from `/nix/store/vyw1icmwb4i9jlf3ghw5yp01gyyh2lii-source/nix/modules/knot.nix':

       … while evaluating the option `services.tangled.knot.package':

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

       error: Failed to fetch git repository 'https://tangled.org/isabelroses.com/fetch-tangled'