diff --git a/flake.nix b/flake.nix
index 3e5ea25..3b7a0ba 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,7 +21,12 @@
       {
         devShells.default = pkgs.mkShell {
           packages = with pkgs; [
+            dune_3
             ocaml-pkgs.ocaml
+            ocaml-pkgs.ocamlPackages.utop
+            ocaml-pkgs.ocamlPackages.findlib
+            ocaml-pkgs.ocamlPackages.ocamlformat
+            ocaml-pkgs.ocamlPackages.ocaml-lsp
           ];
         };
       }