Weird error when rebuilding

I’m working on my refactoring branch here: GitHub - Cool-Game-Dev/elysium at options-reformat

and whenever I try to rebuild using the following command: sudo nix build .#nixosConfigurations.Hydra.config.system.build.toplevel --extra-experimental-features pipe-operators (because nixos-rebuild doesn’t allow for the --extra-experimental-features flag) i get the following error:

error:
       … while calling the 'seq' builtin
         at /nix/store/h2bn031b0fj0ymv9v7bv5rcdjx58y2l9-source/lib/modules.nix:360:18:
          359|         options = checked options;
          360|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          361|         _module = checked (config._module);

       … while calling the 'throw' builtin
         at /nix/store/h2bn031b0fj0ymv9v7bv5rcdjx58y2l9-source/lib/modules.nix:332:13:
          331|           else
          332|             throw baseMsg
             |             ^
          333|         else

       error: The option `default' does not exist. Definition values:
       - In `/nix/store/h2bn031b0fj0ymv9v7bv5rcdjx58y2l9-source/flake.nix': /nix/store/zyh2954p724f08p7lxakz86zi968p90s-source/nixos

When checking, /nix/store/h2bn031b0fj0ymv9v7bv5rcdjx58y2l9-source/flake.nix is nixpkgs, and /nix/store/zyh2954p724f08p7lxakz86zi968p90s-source/nixos is home-manager, both are fully up to date. I’m really not sure how to fix this, as it seems it’s an error in home-manager, but I’m not sure. Does anyone have ideas?

You missed a .default at the end of this line: