diff --git a/default.nix b/default.nix
index 2ad52bd..cd97f74 100644
--- a/default.nix
+++ b/default.nix
@@ -25,6 +25,7 @@ stdenv.mkDerivation rec {
       core_extended
       findlib
       utop
+      dune
     ];
   shellHook = ''
     alias utop="utop -init ${ocamlInit}"