diff --git a/pkgs/development/tools/ocaml/ocamlify/default.nix b/pkgs/development/tools/ocaml/ocamlify/default.nix
index 0ac69f86c90d..7dd6843d52f9 100644
--- a/pkgs/development/tools/ocaml/ocamlify/default.nix
+++ b/pkgs/development/tools/ocaml/ocamlify/default.nix
@@ -1,5 +1,8 @@
 { lib, stdenv, fetchurl, ocaml, findlib, ocamlbuild }:
 
+lib.throwIf (lib.versionAtLeast ocaml.version "5.0")
+  "ocamlify is not available for OCaml ${ocaml.version}"
+
 stdenv.mkDerivation rec {
   pname = "ocamlify";
   version = "0.0.2";