upgraded lablgtk to version 2.16 to allow compilation with ocaml-4.00.1

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

@@ -3,25 +3,26 @@
 let
   ocaml_version = (builtins.parseDrvName ocaml.name).version;
   pname = "lablgtk";
-  version = "2.14.2";
+  version = "2.16.0";
 in
 
 stdenv.mkDerivation (rec {
   name = "${pname}-${version}";
   src = fetchurl {
-    url = "http://wwwfun.kurims.kyoto-u.ac.jp/soft/olabl/dist/${name}.tar.gz";
-    sha256 = "1fnh0amm7lwgyjdhmlqgsp62gwlar1140425yc1j6inwmgnsp0a9";
+    url = "https://forge.ocamlcore.org/frs/download.php/979/${name}.tar.gz";
+    sha256 = "a0ea9752eb257dadcfc2914408fff339d4c34357802f02c63329dd41b777de2f";
   };
 
   buildInputs = [ocaml findlib pkgconfig gtk libgnomecanvas libglade gtksourceview];
 
-  patches = [ ./META.patch ];
+  # patches = [ ./META.patch ];
 
   configureFlags = "--with-libdir=$(out)/lib/ocaml/${ocaml_version}/site-lib";
   buildFlags = "world";
 
-  postInstall = ''
-    ocamlfind install lablgtk2 META
+  preInstall = ''
+    mkdir -p $out/lib/ocaml/${ocaml_version}/site-lib
+    export OCAMLPATH=$out/lib/ocaml/${ocaml_version}/site-lib/:$OCAMLPATH
   '';
 
   meta = {