nixos/nixos/modules/home-manager.nix

{
  inputs,
  vars,
  ...
}:

{
  home-manager = {
    backupFileExtension = "backup";

    extraSpecialArgs = {
      inherit inputs vars;
    };

    useGlobalPkgs = true;
    useUserPackages = true;

    # Common home-manager imports
    users.${vars.user}.imports = [
      ../../home-manager/common
    ];
  };
}