convoluted solution looking for a problem

unified modules structure

modules/server/default.nix

@@ -1,53 +0,0 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}: let
-  cfg = config.my.server;
-in {
-  imports = [
-    ../_common
-  ];
-
-  options.my.server = {
-    enable = lib.mkEnableOption "server role";
-  };
-
-  config = lib.mkIf cfg.enable {
-    services = {
-      # Enable the OpenSSH daemon.
-      openssh = {
-        enable = true;
-        settings = {
-          # PermitRootLogin = "no"; # this is managed through authorized keys
-          PasswordAuthentication = false;
-          KbdInteractiveAuthentication = false;
-        };
-      };
-    };
-
-    programs = {
-      git.enable = true;
-      zsh.enable = true;
-    };
-
-    networking.firewall = {
-      enable = true;
-      allowedTCPPortRanges = [
-        {
-          # ssh
-          from = 22;
-          to = 22;
-        }
-      ];
-    };
-
-    environment = {
-      systemPackages = with pkgs; [
-        ncdu
-        htop
-      ];
-    };
-  };
-}