convoluted solution looking for a problem

unified modules structure

modules/nixpkgs.nix

@@ -0,0 +1,20 @@
+{...}: {
+  config = {
+    nixpkgs.config.allowUnfree = true;
+
+    system = {
+      stateVersion = "22.11";
+      # enable auto updates
+      autoUpgrade = {
+        enable = true;
+        dates = "weekly";
+      };
+    };
+
+    nix.gc = {
+      automatic = true;
+      dates = "monthly";
+      options = "--delete-older-than 30d";
+    };
+  };
+}