Add conntrack-tools and missing dependencies.

pkgs/development/libraries/libnetfilter_cthelper/default.nix

···
+{ stdenv, fetchurl, pkgconfig, libmnl }:
+
+stdenv.mkDerivation rec {
+  name = "libnetfilter_cthelper-${version}";
+  version = "1.0.0";
+
+  src = fetchurl {
+    url = "http://netfilter.org/projects/libnetfilter_cthelper/files/${name}.tar.bz2";
+    sha256 = "07618e71c4d9a6b6b3dc1986540486ee310a9838ba754926c7d14a17d8fccf3d";
+  };
+
+  buildInputs = [ pkgconfig libmnl ];
+
+  meta = {
+    description = "Userspace library that provides the programming interface to the user-space connection tracking helper infrastructure.";
+    longDescription = ''
+      libnetfilter_cthelper is the userspace library that provides the programming interface
+      to the user-space helper infrastructure available since Linux kernel 3.6. With this
+      library, you register, configure, enable and disable user-space helpers. This library
+      is used by conntrack-tools.
+    '';
+    homepage = http://www.netfilter.org/projects/libnetfilter_cthelper/;
+    license = stdenv.lib.licenses.gpl2Plus;
+    platforms = stdenv.lib.platforms.linux;
+  };
+}

pkgs/development/libraries/libnetfilter_cttimeout/default.nix

···
+{ stdenv, fetchurl, pkgconfig, libmnl }:
+
+stdenv.mkDerivation rec {
+  name = "libnetfilter_cttimeout-${version}";
+  version = "1.0.0";
+
+  src = fetchurl {
+    url = "http://netfilter.org/projects/libnetfilter_cttimeout/files/${name}.tar.bz2";
+    sha256 = "aeab12754f557cba3ce2950a2029963d817490df7edb49880008b34d7ff8feba";
+  };
+
+  buildInputs = [ pkgconfig libmnl ];
+
+  meta = {
+    description = "Userspace library that provides the programming interface to the connection tracking timeout infrastructure.";
+    longDescription = ''
+      libnetfilter_cttimeout is the userspace library that provides the programming
+      interface to the fine-grain connection tracking timeout infrastructure.
+      With this library, you can create, update and delete timeout policies that can
+      be attached to traffic flows. This library is used by conntrack-tools.
+    '';
+    homepage = http://netfilter.org/projects/libnetfilter_cttimeout/;
+    license = stdenv.lib.licenses.gpl2Plus;
+    platforms = stdenv.lib.platforms.linux;
+  };
+}

pkgs/os-specific/linux/conntrack-tools/default.nix

···
+{ fetchurl, stdenv, flex, bison, pkgconfig, libmnl, libnfnetlink
+, libnetfilter_conntrack, libnetfilter_queue, libnetfilter_cttimeout
+, libnetfilter_cthelper }:
+
+stdenv.mkDerivation rec {
+  name = "conntrack-tools-${version}";
+  version = "1.4.2";
+
+  src = fetchurl {
+    url = "http://www.netfilter.org/projects/conntrack-tools/files/${name}.tar.bz2";
+    sha256 = "e5c423dc077f9ca8767eaa6cf40446943905711c6a8fe27f9cc1977d4d6aa11e";
+  };
+
+  buildInputs = [ libmnl libnfnetlink libnetfilter_conntrack libnetfilter_queue
+    libnetfilter_cttimeout libnetfilter_cthelper ];
+  nativeBuildInputs = [ flex bison pkgconfig ];
+
+  meta = with stdenv.lib; {
+    homepage = http://conntrack-tools.netfilter.org/;
+    description = "Connection tracking userspace tools";
+    platforms = platforms.linux;
+    license = licenses.gpl2Plus;
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   libnetfilter_conntrack = callPackage ../development/libraries/libnetfilter_conntrack { };
 
+  libnetfilter_cthelper = callPackage ../development/libraries/libnetfilter_cthelper { };
+
+  libnetfilter_cttimeout = callPackage ../development/libraries/libnetfilter_cttimeout { };
+
   libnetfilter_queue = callPackage ../development/libraries/libnetfilter_queue { };
 
   libnfnetlink = callPackage ../development/libraries/libnfnetlink { };
···
     weatherMetar = config.conky.weatherMetar or false;
     weatherXoap  = config.conky.weatherXoap  or false;
   };
+
+  conntrack_tools = callPackage ../os-specific/linux/conntrack-tools { };
 
   cpufrequtils = callPackage ../os-specific/linux/cpufrequtils { };