diff --git a/flake.nix b/flake.nix
index 3970205f6a1..176542b548a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,7 +27,7 @@
         '';
       in rec {
         packages = {
-          inherit z3 fstar emacs;
+          inherit z3 fstar emacs ocamlPackages;
           default = fstar;
         };
         apps.emacs = {