diff --git a/main/packages.nix b/main/packages.nix
index 1328b3b..d10c1c0 100644
--- a/main/packages.nix
+++ b/main/packages.nix
@@ -159,6 +159,7 @@
 
         # nix
         cachix
+        nix-diff
         nix-index
         nixfmt
         nixpkgs-fmt