diff --git a/pkgs/development/compilers/teyjus/default.nix b/pkgs/development/compilers/teyjus/default.nix
index 301915b7a26..fafc58371ef 100644
--- a/pkgs/development/compilers/teyjus/default.nix
+++ b/pkgs/development/compilers/teyjus/default.nix
@@ -1,11 +1,11 @@
-{ stdenv, fetchurl, omake, ocaml, flex, bison }:
+{ stdenv, fetchzip, omake, ocaml, flex, bison }:
 
 stdenv.mkDerivation {
-  name = "teyjus-2.0b2";
+  name = "teyjus-2.1";
 
-  src = fetchurl {
-    url = "https://teyjus.googlecode.com/files/teyjus-source-2.0-b2.tar.gz";
-    sha256 = "f589fb460d7095a6e674b7a6413772c41b98654c38602c3e8c477a976da99052";
+  src = fetchzip {
+    url = https://github.com/teyjus/teyjus/archive/v2.1.tar.gz;
+    sha256 = "064jqf68zpmvndgyhilmxfhnvx1bzm8avhgw82csj5wxw5ky6glz";
   };
 
   patches = [ ./fix-lex-to-flex.patch ];
diff --git a/pkgs/development/compilers/teyjus/fix-lex-to-flex.patch b/pkgs/development/compilers/teyjus/fix-lex-to-flex.patch
index d2da1d3facc..52d259bb64d 100644
--- a/pkgs/development/compilers/teyjus/fix-lex-to-flex.patch
+++ b/pkgs/development/compilers/teyjus/fix-lex-to-flex.patch
@@ -1,23 +1,23 @@
-diff --git a/source/OMakefile b/source/OMakefile
-index 6b19d84..095b8b6 100644
---- a/source/OMakefile
-+++ b/source/OMakefile
-@@ -164,12 +164,17 @@ LNK_MAIN = $(FNT)/linkerfront
+--- a/source/OMakefile	1970-01-01 00:00:01.000000000 +0000
++++ b/source/OMakefile	2016-12-02 08:48:42.000000000 +0000
+@@ -183,18 +183,18 @@
  DEP_MAIN = $(FNT)/dependfront
+ PAR_MAIN = $(FNT)/parsefront
  
- ############################################################
-+# Nixpkgs specific changes
-+#
-+
 +LEX = flex
 +
-+############################################################
+ ############################################################
  # Platform specific changes
  #
  
+ if $(mem $(SYSNAME), Linux)
+     YACC = bison -by
+-    LEX = flex
+     export
+ 
  if $(mem $(OSTYPE), Cygwin Win32)
      YACC = bison -by
 -    LEX = flex
-     CFLAGS += -mno-cygwin
+     CC = i686-pc-mingw32-gcc
      INC_C[] += $(INC)/byteswap $(INC)/search
      export
diff --git a/pkgs/development/ocaml-modules/camlimages/4.0.nix b/pkgs/development/ocaml-modules/camlimages/4.0.nix
index 4f47680dcec..0ec3a26d051 100644
--- a/pkgs/development/ocaml-modules/camlimages/4.0.nix
+++ b/pkgs/development/ocaml-modules/camlimages/4.0.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, omake, ocaml, omake_rc1, libtiff, libjpeg, libpng, giflib, findlib, libXpm, freetype, graphicsmagick, ghostscript }:
+{ stdenv, fetchurl, omake, ocaml, libtiff, libjpeg, libpng, giflib, findlib, libXpm, freetype, graphicsmagick, ghostscript }:
 
 let
   pname = "camlimages";
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
     sha256 = "b40237c1505487049799a7af296eb3996b3fa08eab94415546f46d61355747c4";
   };
 
-  buildInputs = [ocaml omake_rc1 findlib graphicsmagick ghostscript ];
+  buildInputs = [ ocaml omake findlib graphicsmagick ghostscript ];
 
   propagatedBuildInputs = [libtiff libjpeg libpng giflib freetype libXpm ];
 
diff --git a/pkgs/development/ocaml-modules/camlimages/4.1.nix b/pkgs/development/ocaml-modules/camlimages/4.1.nix
index f98d149c482..77a252de52f 100644
--- a/pkgs/development/ocaml-modules/camlimages/4.1.nix
+++ b/pkgs/development/ocaml-modules/camlimages/4.1.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, omake, ocaml, omake_rc1, libtiff, libjpeg, libpng, giflib, findlib, libXpm, freetype, graphicsmagick, ghostscript }:
+{stdenv, fetchurl, omake, ocaml, libtiff, libjpeg, libpng, giflib, findlib, libXpm, freetype, graphicsmagick, ghostscript }:
 
 assert stdenv.lib.versionAtLeast (stdenv.lib.getVersion ocaml) "4.00";
 
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
     sha256 = "1ppddhfknpirj1vilm5dxgyp82kf7ahpvjmh7z75a1fnaqv3kpki";
   };
 
-  buildInputs = [ocaml omake_rc1 findlib graphicsmagick ghostscript ];
+  buildInputs = [ ocaml omake findlib graphicsmagick ghostscript ];
 
   propagatedBuildInputs = [libtiff libjpeg libpng giflib freetype libXpm ];
 
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
deleted file mode 100644
index 9f318afc67d..00000000000
--- a/pkgs/development/tools/ocaml/omake/0.9.8.6-rc1.nix
+++ /dev/null
@@ -1,38 +0,0 @@
-{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 = "http://pkgs.fedoraproject.org/repo/pkgs/ocaml-omake/${pname}-${version}.tar.gz/fe39a476ef4e33b7ba2ca77a6bcaded2/${pname}-${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";
-    platforms = ocaml.meta.platforms or [];
-  };
-}
diff --git a/pkgs/development/tools/ocaml/omake/default.nix b/pkgs/development/tools/ocaml/omake/default.nix
index 451d025aa3c..53152898fd6 100644
--- a/pkgs/development/tools/ocaml/omake/default.nix
+++ b/pkgs/development/tools/ocaml/omake/default.nix
@@ -1,38 +1,24 @@
-{stdenv, fetchurl, makeWrapper, ocaml, ncurses}:
-let
-  pname = "omake";
-  version = "0.9.8.5-3";
-  webpage = "http://omake.metaprl.org";
-in
-stdenv.mkDerivation {
+{ stdenv, fetchurl, ocaml, ncurses }:
 
-  name = "${pname}-${version}";
+stdenv.mkDerivation rec {
+
+  name = "omake-${version}";
+  version = "0.10.1";
 
   src = fetchurl {
-    url = "mirror://debian/pool/main/o/omake/omake_${version}.orig.tar.gz";
-    sha256 = "1bfxbsimfivq0ar2g5fkzvr5ql97n5dg562pfyd29y4zyh4mwrsv";
+    url = "http://download.camlcity.org/download/${name}.tar.gz";
+    sha256 = "093ansbppms90hiqvzar2a46fj8gm9iwnf8gn38s6piyp70lrbsj";
   };
-  patchFlags = "-p0";
-  patches = [ ./omake-build-0.9.8.5.diff ./omake-lm_printf-gcc44.diff ];
 
-  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";
+  buildInputs = [ ocaml ncurses ];
 
   meta = {
     description = "A build system designed for scalability and portability";
-    homepage = "${webpage}";
-    license = "GPL";
-    broken = true;
+    homepage = http://projects.camlcity.org/projects/omake.html;
+    license = with stdenv.lib.licenses; [
+      mit /* scripts */
+      gpl2 /* program */
+    ];
+    inherit (ocaml.meta) platforms;
   };
 }
diff --git a/pkgs/development/tools/ocaml/omake/omake-build-0.9.8.5.diff b/pkgs/development/tools/ocaml/omake/omake-build-0.9.8.5.diff
deleted file mode 100644
index b0a091e341c..00000000000
--- a/pkgs/development/tools/ocaml/omake/omake-build-0.9.8.5.diff
+++ /dev/null
@@ -1,11 +0,0 @@
---- src/exec/omake_exec.ml	2006-12-08 23:52:01.000000000 +0100
-+++ src/exec/omake_exec.ml	2009-04-15 22:19:07.000000000 +0200
-@@ -46,7 +46,7 @@
- open Omake_options
- open Omake_command_type
-
--external sync : unit -> unit = "caml_sync"
-+(*external sync : unit -> unit = "caml_sync"*)
- 
- module Exec =
- struct
diff --git a/pkgs/development/tools/ocaml/omake/omake-lm_printf-gcc44.diff b/pkgs/development/tools/ocaml/omake/omake-lm_printf-gcc44.diff
deleted file mode 100644
index 03665340f5f..00000000000
--- a/pkgs/development/tools/ocaml/omake/omake-lm_printf-gcc44.diff
+++ /dev/null
@@ -1,22 +0,0 @@
---- src/libmojave-external/cutil/lm_printf.c.orig	2007-07-15 19:55:23.000000000 +0200
-+++ src/libmojave-external/cutil/lm_printf.c		2009-06-21 19:20:40.000000000 +0200
-@@ -144,3 +144,3 @@
-         if(bufp != buffer)
--            free(buffer);
-+            free(bufp);
-         failwith("ml_print_string");
-@@ -149,3 +149,3 @@
-     if(bufp != buffer)
--        free(buffer);
-+        free(bufp);
-     return v_result;
-@@ -192,3 +192,3 @@
-         if(bufp != buffer)
--            free(buffer);
-+            free(bufp);
-         failwith("ml_print_string");
-@@ -197,3 +197,3 @@
-     if(bufp != buffer)
--        free(buffer);
-+        free(bufp);
-     return v_result;
diff --git a/pkgs/development/tools/ocaml/omake/warn.patch b/pkgs/development/tools/ocaml/omake/warn.patch
deleted file mode 100644
index 4459e89d7f9..00000000000
--- a/pkgs/development/tools/ocaml/omake/warn.patch
+++ /dev/null
@@ -1,10 +0,0 @@
-diff -p1 -aur ../omake-0.9.8.6.ori/lib/build/OCaml.om ./lib/build/OCaml.om
---- ../omake-0.9.8.6.ori/lib/build/OCaml.om	2008-03-05 01:07:25.000000000 +0000
-+++ ./lib/build/OCaml.om	2013-06-01 15:52:37.000000000 +0000
-@@ -178,3 +178,3 @@ declare OCAMLDEPFLAGS
- public.OCAMLPPFLAGS  =
--public.OCAMLFLAGS    = -warn-error A
-+public.OCAMLFLAGS    =
- public.OCAMLCFLAGS   = -g
-Seulement dans ./lib/build: OCaml.om~
-Seulement dans .: warn.patch
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3804014a1df..e8b7341cd39 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5303,9 +5303,7 @@ in
     lua = lua5_1;
   };
 
-  teyjus = callPackage ../development/compilers/teyjus {
-    omake = omake_rc1;
-  };
+  teyjus = callPackage ../development/compilers/teyjus { };
 
   thrust = callPackage ../development/tools/thrust {
     gconf = pkgs.gnome2.GConf;
@@ -6345,7 +6343,9 @@ in
   noweb = callPackage ../development/tools/literate-programming/noweb { };
   nuweb = callPackage ../development/tools/literate-programming/nuweb { tex = texlive.combined.scheme-small; };
 
-  inherit (ocamlPackages) omake omake_rc1;
+  omake = callPackage ../development/tools/ocaml/omake {
+    inherit (ocamlPackages_4_02) ocaml;
+  };
 
   omniorb = callPackage ../development/tools/omniorb { };
 
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 46f1ce4b023..dc497b125e6 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -649,9 +649,6 @@ let
 
     trv = callPackage ../development/tools/misc/trv { };
 
-    omake = callPackage ../development/tools/ocaml/omake { };
-    omake_rc1 = callPackage ../development/tools/ocaml/omake/0.9.8.6-rc1.nix { };
-
     verasco = callPackage ../development/tools/analysis/verasco (
       if system == "x86_64-linux"
       then { tools = pkgs.pkgsi686Linux.stdenv.cc; }