diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index a066fc19ffb..067f074bdc0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2786,6 +2786,22 @@ let
 
   ocamlnat = let callPackage = newScope pkgs.ocamlPackages_3_12_1; in callPackage ../development/ocaml-modules/ocamlnat { };
 
+  # patoline requires a rather large ocaml compilation environment.
+  # this is why it is build as an environment and not just a normal package.
+  # remark : the emacs mode is also installed, but you have to adjust your load-path.
+  mkPatolineEnv = pack: pkgs.myEnvFun {
+      name = "patoline";
+      buildInputs = [ stdenv ncurses mesa freeglut libzip
+                                   pack.ocaml pack.findlib pack.camomile 
+	                           pack.dypgen pack.ocaml_sqlite3 pack.camlzip 
+				   pack.lablgtk pack.camlimages pack.ocaml_cairo
+				   pack.lablgl pack.ocamlnet pack.cryptokit
+				   pack.ocaml_pcre pack.patoline
+				   ];
+   };
+
+   patoline = mkPatolineEnv ocamlPackages_4_00_1;
+
   opencxx = callPackage ../development/compilers/opencxx {
     gcc = gcc33;
   };