diff --git a/system/profile/base.nix b/system/profile/base.nix
index a2495f3..62dd929 100644
--- a/system/profile/base.nix
+++ b/system/profile/base.nix
@@ -99,6 +99,7 @@ in
         nix-du
         graphviz # for nix-du
         nvd
+        nix-diff
 
         # secrets
         age