diff --git a/pkgs/development/ocaml-modules/erm_xml/default.nix b/pkgs/development/ocaml-modules/erm_xml/default.nix
index ae264b657d87..c944752ff6b6 100644
--- a/pkgs/development/ocaml-modules/erm_xml/default.nix
+++ b/pkgs/development/ocaml-modules/erm_xml/default.nix
@@ -1,5 +1,9 @@
 { stdenv, fetchzip, ocaml, findlib, ocamlbuild }:
 
+if stdenv.lib.versionAtLeast ocaml.version "4.06"
+then throw "erm_xml is not available for OCaml ${ocaml.version}"
+else
+
 let version = "0.3"; in
 
 stdenv.mkDerivation {