diff --git a/pkgs/helix/default.nix b/pkgs/helix/default.nix
index 8e85c52..5af9619 100644
--- a/pkgs/helix/default.nix
+++ b/pkgs/helix/default.nix
@@ -8,6 +8,7 @@
   runtime = callPackage ./runtime.nix {};
   runtimeInputs = (
     with pkgs; [
+      nixfmt-rfc-style
       idris2Packages.idris2Lsp
       lua-language-server
       bash-language-server