diff --git a/flake.nix b/flake.nix
index 91c7211..49d5cb0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -69,10 +69,6 @@
   outputs = { self, nixpkgs-stable, nixpkgs-unstable, home-manager-stable, home-manager-unstable, hy3, ... }@inputs:
   let
     inherit (self) outputs;
-    forAllSystems = nixpkgs-stable.lib.genAttrs [
-      # "aarch64-linux"
-      "x86_64-linux"
-    ];
   in
   {
     hydraJobs = import ./hydra.nix { inherit inputs outputs; };
diff --git a/home-manager/durincore.nix b/home-manager/durincore.nix
index 0a9e154..1e9b036 100644
--- a/home-manager/durincore.nix
+++ b/home-manager/durincore.nix
@@ -172,7 +172,11 @@
       # other
       df = "df -h";
       du = "du -h";
+
+      # nvd - nix visual diff
+      nvdiff = "nvd diff /run/current-system result";
     };
+    
     # rtx hook-env | source
     # rtx activate fish | source
     shellInit = ''
diff --git a/nixos/common.nix b/nixos/common.nix
index be267ae..01f59b2 100644
--- a/nixos/common.nix
+++ b/nixos/common.nix
@@ -159,6 +159,9 @@
     shellcheck
     envsubst
 
+    # nix tools
+    nvd
+
   ];
   # my traceroute
   programs.mtr.enable = true;