diff --git a/pkgs/tools/networking/ncat/default.nix b/pkgs/tools/networking/ncat/default.nix
new file mode 100644
index 00000000000..8627fe502ac
--- /dev/null
+++ b/pkgs/tools/networking/ncat/default.nix
@@ -0,0 +1,24 @@
+{stdenv, fetchurl, openssl}:
+stdenv.mkDerivation {
+  name = "ncat-0.10rc3";
+
+  src = fetchurl {
+    url = http://ovh.dl.sourceforge.net/sourceforge/nmap-ncat/ncat-0.10rc3.tar.gz;
+    sha256 = "1yb26ipxwhqkfannji90jxi38k35fal4ffx0jm5clr1a1rndjjzb";
+  };
+
+  patches = [./ncat-0.10rc3.patch ];
+
+  buildInputs = [openssl ];
+
+  CFLAGS = "-g";
+
+  postInstall = "install -D ncat \${out}/bin/ncat ; 
+	install -D docs/man/ncat.1 \${out}/man/ncat.1 ;";
+
+  meta = {
+    description = "
+	Ncat - some effort to join features from different `netcat's. Supports IPv6.
+";
+  };
+}
diff --git a/pkgs/tools/networking/ncat/ncat-0.10rc3.patch b/pkgs/tools/networking/ncat/ncat-0.10rc3.patch
new file mode 100644
index 00000000000..ed4c93673aa
--- /dev/null
+++ b/pkgs/tools/networking/ncat/ncat-0.10rc3.patch
@@ -0,0 +1,38 @@
+diff -urN ncat-0.10rc3/ncat_main.c ncat-0.10rc3-fixed/ncat_main.c
+--- ncat-0.10rc3/ncat_main.c	2006-01-10 03:29:08.000000000 +0300
++++ ncat-0.10rc3-fixed/ncat_main.c	2007-07-09 09:58:58.000000000 +0400
+@@ -23,6 +23,7 @@
+ {
+     struct sockaddr_in ss;
+     struct sockaddr_in6 ss6;
++    struct sockaddr_storage sst;
+     
+     struct conn_state cs;
+ 
+@@ -271,7 +272,7 @@
+ 	}
+ 
+ 	/* resolve hostname */
+-	if (!resolve(argv[optind], (struct sockaddr_storage *) &ss)) {
++	if (!resolve(argv[optind], (struct sockaddr_storage *) &sst)) {
+ 	    /* host failed to resolve :( */
+ 	    fprintf(stderr,
+ 		    "%s: Could not resolve target hostname %s. QUITTING.\n",
+@@ -297,6 +298,8 @@
+ 
+ 	/* IPv6 connect() */
+ 	if (oipv == 6) {
++            memcpy(&ss6,&sst,sizeof(ss6));
++	
+ 	    ss6.sin6_family = AF_INET6;
+ 	    ss_len = sizeof(struct sockaddr_in6);
+ 
+@@ -329,6 +332,8 @@
+ 	}
+ 	/* IPv4 connect() - default. */
+ 	else {
++            memcpy(&ss,&sst,sizeof(ss)); 
++
+ 	    ss.sin_family = AF_INET;
+ 	    ss_len = sizeof(struct sockaddr_in);
+ 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b8adbf91ddf..abad521179a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -447,6 +447,10 @@ rec {
     inherit fetchurl stdenv;
   };
 
+  ncat = import ../tools/networking/ncat {
+    inherit fetchurl stdenv openssl;
+  };
+
   netcat = import ../tools/networking/netcat {
     inherit fetchurl stdenv;
   };