diff --git a/configuration.nix b/configuration.nix
index a014617..2a708c4 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -1,7 +1,6 @@
 { pkgs, config, lib, modulesPath, ... }: {
   imports = [
     (modulesPath + "/installer/scan/not-detected.nix")
-    # ./modules/disk-config.nix
     ./modules/custom
     ./modules/uptimed.nix
   ];
@@ -183,4 +182,10 @@
       experimental-features = nix-command flakes
     '';
   };
+
+  system.activationScripts.diff = ''
+    if [[ -e  /run/current-system ]]; then
+      ${pkgs.nix}/bin/nix store diff-closures /run/current-system "$systemConfig"
+    fi
+  '';
 }