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-rw-r--r--pkgs/top-level/ocaml-packages.nix4
1 files changed, 4 insertions, 0 deletions
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 5c2ec39ade7..7ac8508d889 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -374,6 +374,10 @@ let
 
     ocaml_lwt = if lib.versionOlder "4.02" ocaml.version then lwt3 else lwt2;
 
+    lwt_ppx = callPackage ../development/ocaml-modules/lwt/ppx.nix {
+      lwt = lwt3;
+    };
+
     lwt_react = callPackage ../development/ocaml-modules/lwt_react {
       lwt = lwt3;
     };