diff --git a/nix/flake.nix b/nix/flake.nix
index 95c7dea..def2e55 100644
--- a/nix/flake.nix
+++ b/nix/flake.nix
@@ -72,6 +72,7 @@
         pkgs.yarn
         pkgs.jpm
         pkgs.kotlin-lsp
+        pkgs.ktfmt
         pkgs.meld
         pkgs.mprocs
         pkgs.nodejs_24