diff --git a/pkgs/tools/networking/asynk/default.nix b/pkgs/tools/networking/asynk/default.nix
new file mode 100644
index 000000000000..cb3e1445aa39
--- /dev/null
+++ b/pkgs/tools/networking/asynk/default.nix
@@ -0,0 +1,36 @@
+{ stdenv, fetchurl, python2, python2Packages, makeWrapper }:
+
+stdenv.mkDerivation rec {
+  version = "2.0.0-rc2";
+  name = "ASynK-${version}";
+
+  src = fetchurl {
+    name = "${name}.tar.gz";
+    url = "https://github.com/skarra/ASynK/archive/v${version}.tar.gz";
+    sha256 = "14s53ijn9fpxr490ypnn92zk6h5rdadf7j3z98rah1h7l659qi1b";
+  };
+
+  propagatedBuildInputs = with python2Packages; [ python2 makeWrapper tornado requests dateutil ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp asynk.py $out/bin/
+    cp state.init.json $out/
+    cp -R config $out/
+    cp -R lib $out/
+    cp -R asynk $out/
+
+    substituteInPlace $out/bin/asynk.py \
+      --replace "ASYNK_BASE_DIR    = os.path.dirname(os.path.abspath(__file__))" "ASYNK_BASE_DIR    = \"$out\""
+
+    wrapProgram "$out/bin/asynk.py" \
+      --prefix PYTHONPATH : "$PYTHONPATH"
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = http://asynk.io/;
+    description = "Flexible contacts synchronization program";
+    license = licenses.agpl3;
+    maintainers = [ maintainers.DamienCassou ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index af8aec8cb98e..e0ca4d60e695 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -766,6 +766,8 @@ let
 
   autossh = callPackage ../tools/networking/autossh { };
 
+  asynk = callPackage ../tools/networking/asynk { };
+
   bacula = callPackage ../tools/backup/bacula { };
 
   bareos = callPackage ../tools/backup/bareos { };