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diff --git a/apps/default.nix b/apps/default.nix
index 6a0619f71fb1017f051bfa0f5703e0d0facc6e1a..ed9a189f9b81030cac05f7107ea2fc6d4a4660c1 100644
--- a/apps/default.nix
+++ b/apps/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, ... }: {
+{ pkgs, config, ... }: {
   imports = [
     ./bat.nix
     ./bottom.nix
@@ -47,6 +47,9 @@
       # Personal NUR
       nur.repos.jolheiser.tmpl
     ];
+    activation.report-changes = config.lib.dag.entryAnywhere ''
+      ${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff $oldGenPath $newGenPath
+    '';
     stateVersion = "22.11";
   };
 

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diff --git a/machines/common/default.nix b/machines/common/default.nix
index 4139750e86519c29d9e406cddd88c1e4d59a9a8b..07e48a6c14b4fea9f69e4fbe67a5eac1741d5c71 100644
--- a/machines/common/default.nix
+++ b/machines/common/default.nix
@@ -52,6 +52,13 @@       auto-optimise-store = true;
     };
   };
 
+  system.activationScripts.diff = {
+    supportsDryActivation = true;
+    text = ''
+      ${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff /run/current-system "$systemConfig"
+    '';
+  };
+
   environment = {
     systemPackages = with pkgs; [ podman podman-compose podman-tui ];
   };