diff --git a/pkgs/development/ocaml-modules/ocamlnet/default.nix b/pkgs/development/ocaml-modules/ocamlnet/default.nix
index 22cd84da1f8..c650155ff38 100644
--- a/pkgs/development/ocaml-modules/ocamlnet/default.nix
+++ b/pkgs/development/ocaml-modules/ocamlnet/default.nix
@@ -2,9 +2,8 @@
 , gnutls, nettle
 }:
 
-if lib.versionOlder ocaml.version "4.02"
-then throw "ocamlnet is not available for OCaml ${ocaml.version}"
-else
+lib.throwIf (lib.versionOlder ocaml.version "4.02" || lib.versionAtLeast ocaml.version "5.0")
+  "ocamlnet is not available for OCaml ${ocaml.version}"
 
 stdenv.mkDerivation rec {
   pname = "ocaml${ocaml.version}-ocamlnet";