diff --git a/flake.nix b/flake.nix
index 6fa0ab3..bd1943b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -76,7 +76,7 @@
       };
 
       lib = import ./lib { inherit (nixpkgs) lib; };
-      formatter = forAllSystems (system: (makePkgs system).nixfmt-rfc-style);
+      formatter = forAllSystems (system: (makePkgs system).nixfmt-tree);
       deploy.nodes.harmonica = {
         hostname = "192.168.0.11";
         profiles.system = {