diff --git a/pkgs/development/ocaml-modules/qtest/default.nix b/pkgs/development/ocaml-modules/qtest/default.nix
index 6d5f8ecc683..4d3ab0ddb4f 100644
--- a/pkgs/development/ocaml-modules/qtest/default.nix
+++ b/pkgs/development/ocaml-modules/qtest/default.nix
@@ -1,5 +1,9 @@
 { stdenv, fetchzip, ocaml, findlib, ocamlbuild, ounit }:
 
+if !stdenv.lib.versionAtLeast ocaml.version "4"
+then throw "qtest is not available for OCaml ${ocaml.version}"
+else
+
 let version = "2.2"; in
 
 stdenv.mkDerivation {