ocamlPackages.lablgtk: unpin gnumake42 (#372804)

pkgs/development/ocaml-modules/lablgtk/default.nix

@@ -3,6 +3,7 @@
   stdenv,
   fetchurl,
   fetchFromGitHub,
+  fetchpatch,
   ocaml,
   findlib,
   pkg-config,
@@ -10,7 +11,6 @@
   libgnomecanvas,
   gtksourceview,
   camlp-streams,
-  gnumake42,
 }:
 
 let
@@ -51,12 +51,18 @@ stdenv.mkDerivation {
   pname = "ocaml${ocaml.version}-lablgtk";
   inherit (param) version src env;
 
-  # gnumake42: https://github.com/garrigue/lablgtk/issues/162
+  # https://github.com/garrigue/lablgtk/issues/162
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/garrigue/lablgtk/commit/c9717249954d1713815d435c84f9953a685af4be.patch";
+      hash = "sha256-jxmcAIIpdee7sPKfeLAijBnwgKDTjXuiWlh6c9rs+18=";
+    })
+  ];
+
   nativeBuildInputs = [
     pkg-config
     ocaml
     findlib
-    gnumake42
   ];
   buildInputs = [
     gtk2