diff --git a/nix/flake.nix b/nix/flake.nix
index 5e78bb3..ce76909 100644
--- a/nix/flake.nix
+++ b/nix/flake.nix
@@ -78,6 +78,7 @@
         pkgs.meld
         pkgs.mprocs
         pkgs.nil
+        pkgs.nixfmt-classic
         pkgs.nodejs_24
         pkgs.pandoc
         pkgs.qmk