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/93x1amkyf8dp6qmdj5ww935g0vg5vh52-source/flake.nix, via option perSystem':

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

       … while evaluating definitions from `/nix/store/14wlijd4rrdfyl2cnbw5p8grq7bpr0zg-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `warnings':

       … while evaluating definitions from `/nix/store/14wlijd4rrdfyl2cnbw5p8grq7bpr0zg-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services.home-manager-mhelton.serviceConfig':

       … while evaluating definitions from `/nix/store/2dx8avbzvz3lrv20r7d5s90iwdlbq5rp-source/nixos':

       … while evaluating the option `home-manager.users.mhelton.home.file.".manpath".source':

       … while evaluating definitions from `/nix/store/2dx8avbzvz3lrv20r7d5s90iwdlbq5rp-source/modules/files.nix':

       … while evaluating the option `home-manager.users.mhelton.home.file.".manpath".text':

       … while evaluating definitions from `/nix/store/2dx8avbzvz3lrv20r7d5s90iwdlbq5rp-source/modules/programs/man/man-db.nix':

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

       error: fetchFromGitHub requires one of either `rev` or `tag` to be provided (not both).