diff --git a/pkgs/development/ocaml-modules/gen/default.nix b/pkgs/development/ocaml-modules/gen/default.nix
index 77fc0b63c55e..1c12f3ac5f87 100644
--- a/pkgs/development/ocaml-modules/gen/default.nix
+++ b/pkgs/development/ocaml-modules/gen/default.nix
@@ -1,9 +1,8 @@
 { stdenv, lib, fetchFromGitHub, ocaml, findlib, ocamlbuild, qtest, ounit }:
 
-let version = "0.5"; in
-
-stdenv.mkDerivation {
-  name = "ocaml${ocaml.version}-gen-${version}";
+stdenv.mkDerivation rec {
+  version = "0.5";
+  pname = "ocaml${ocaml.version}-gen";
 
   src = fetchFromGitHub {
     owner = "c-cube";
@@ -13,14 +12,12 @@ stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ ocaml findlib ocamlbuild ];
-  buildInputs = [ qtest ounit ];
+  buildInputs = lib.optionals doCheck [ qtest ounit ];
   strictDeps = true;
 
-  configureFlags = [
-    "--enable-tests"
-  ];
+  configureFlags = lib.optional doCheck "--enable-tests";
 
-  doCheck = true;
+  doCheck = lib.versionAtLeast ocaml.version "4.08";
   checkTarget = "test";
 
   createFindlibDestdir = true;
@@ -29,6 +26,6 @@ stdenv.mkDerivation {
     homepage = "https://github.com/c-cube/gen";
     description = "Simple, efficient iterators for OCaml";
     license = lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms or [];
+    inherit (ocaml.meta) platforms;
   };
 }