diff --git a/flake.nix b/flake.nix
index e43d0b0..6660a65 100644
--- a/flake.nix
+++ b/flake.nix
@@ -97,6 +97,7 @@
               keep-sorted.enable = true;
               markdownlint.enable = true;
               nil.enable = true;
+              nixf-diagnose.enable = true;
               nixfmt-rfc-style.enable = true;
               shellcheck.enable = true;
               statix.enable = true;