diff --git a/pkgs/applications/version-management/darcs_2_pre.nix b/pkgs/applications/version-management/darcs_2_pre.nix
new file mode 100644
index 00000000000..a8bd48aa336
--- /dev/null
+++ b/pkgs/applications/version-management/darcs_2_pre.nix
@@ -0,0 +1,16 @@
+{stdenv, fetchurl, ghc, zlib, ncurses, curl}:
+
+stdenv.mkDerivation {
+  name = "darcs-2.0.0pre3";
+  src = fetchurl {
+    url = http://darcs.net/darcs-2.0.0pre3.tar.gz;
+    sha256 = "";
+  };
+  buildInputs = [ghc zlib ncurses curl];
+
+  NIX_LDFLAGS = "-lz";
+
+  meta = {
+    description = "Patch-based version management system";
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c8202f82fe2..d7320bf3372 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4300,6 +4300,12 @@ rec {
     ghc = ghc661;
   };
 
+  # some speed bottle necks are resolved in this version I think .. perhaps you like to try it? 
+  darcs_2_pre = import ../applications/version-management/darcs_2_pre.nix {
+    inherit fetchurl stdenv zlib ncurses curl;
+    ghc = ghc661;
+  };
+
   dia = import ../applications/graphics/dia {
     inherit stdenv fetchurl pkgconfig perl perlXMLParser 
 	libxml2 gettext python libxml2Python docbook5 docbook_xsl