diff --git a/flake.nix b/flake.nix
index 97696d5..85fba23 100644
--- a/flake.nix
+++ b/flake.nix
@@ -48,6 +48,7 @@
             distcc
             gdb
             next.git-cliff
+            nixfmt
             valgrind
           ]);
           shellHook = ''