diff --git a/dev/treefmt.nix b/dev/treefmt.nix
index 22b93bd..d71f635 100644
--- a/dev/treefmt.nix
+++ b/dev/treefmt.nix
@@ -8,6 +8,7 @@
 
   programs.clang-format.enable = true;
   programs.clang-format.package = pkgs.llvmPackages_latest.clang-tools;
+  settings.formatter.clang-format.args = [ "-style=file" ];
 
   programs.deadnix.enable = true;
   programs.nixfmt.enable = true;