diff --git a/pkgs/development/tools/ocaml/omake/0.9.8.6-rc1.nix b/pkgs/development/tools/ocaml/omake/0.9.8.6-rc1.nix
new file mode 100644
index 000000000000..48a6b3c1f64d
--- /dev/null
+++ b/pkgs/development/tools/ocaml/omake/0.9.8.6-rc1.nix
@@ -0,0 +1,37 @@
+{stdenv, fetchurl, makeWrapper, ocaml, ncurses}:
+let
+  pname = "omake";
+  version = "0.9.8.6-0.rc1";
+  webpage = "http://omake.metaprl.org";
+in
+stdenv.mkDerivation {
+
+  name = "${pname}-${version}";
+
+  src = fetchurl {
+    url = "${webpage}/downloads/${pname}-${version}.tar.gz";
+    sha256 = "1sas02pbj56m7wi5vf3vqrrpr4ynxymw2a8ybvfj2dkjf7q9ii13";
+  };
+  patchFlags = "-p0";
+  patches = [ ./warn.patch ];
+
+  buildInputs = [ ocaml makeWrapper ncurses ];
+
+  phases = "unpackPhase patchPhase buildPhase";
+  buildPhase = ''
+    make bootstrap
+    make PREFIX=$out all
+    make PREFIX=$out install
+  '';
+#  prefixKey = "-prefix ";
+#
+#  configureFlags = if transitional then "--transitional" else "--strict";
+#
+#  buildFlags = "world.opt";		
+
+  meta = {
+    description = "Omake build system";
+    homepage = "${webpage}";
+    license = "GPL";
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 89d265c99cfa..4bc2875b8f14 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3385,6 +3385,7 @@ let
   noweb = callPackage ../development/tools/literate-programming/noweb { };
 
   omake = callPackage ../development/tools/ocaml/omake { };
+  omake_rc1 = callPackage ../development/tools/ocaml/omake/0.9.8.6-rc1.nix { };
 
   openocd = callPackage ../development/tools/misc/openocd { };