diff --git a/pkgs/development/ocaml-modules/cstruct/lwt.nix b/pkgs/development/ocaml-modules/cstruct/lwt.nix
index fc621838966..5a10d7cae48 100644
--- a/pkgs/development/ocaml-modules/cstruct/lwt.nix
+++ b/pkgs/development/ocaml-modules/cstruct/lwt.nix
@@ -1,4 +1,8 @@
-{ buildDunePackage, cstruct, lwt }:
+{ lib, buildDunePackage, cstruct, lwt }:
+
+if !lib.versionAtLeast (cstruct.version or "1") "3"
+then cstruct
+else
 
 buildDunePackage {
 	pname = "cstruct-lwt";