diff --git a/flake.nix b/flake.nix
index d19a8d4..4344bd9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,6 +18,10 @@
             pkgs.rust-analyzer
             pkgs.rustc
             pkgs.rustfmt
+
+            # formatters
+            pkgs.elmPackages.elm-format
+            pkgs.nodePackages.prettier
           ];
         };
       }