diff --git a/pkgs/development/python-modules/toolz/default.nix b/pkgs/development/python-modules/toolz/default.nix
new file mode 100644
index 00000000000..36b85bce3ac
--- /dev/null
+++ b/pkgs/development/python-modules/toolz/default.nix
@@ -0,0 +1,31 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, nose
+}:
+
+buildPythonPackage rec{
+  pname = "toolz";
+  version = "0.8.2";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0l3czks4xy37i8099waxk2fdz5g0k1dwys2mkhlxc0b0886cj4sa";
+  };
+
+  checkInputs = [ nose ];
+
+  checkPhase = ''
+    # https://github.com/pytoolz/toolz/issues/357
+    rm toolz/tests/test_serialization.py
+    nosetests toolz/tests
+  '';
+
+  meta = {
+    homepage = "http://github.com/pytoolz/toolz/";
+    description = "List processing tools and functional utilities";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ fridh ];
+  };
+}
\ No newline at end of file
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b1fb4958eea..7245b37c51b 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -21303,30 +21303,7 @@ in {
     };
   };
 
-  toolz = buildPythonPackage rec{
-    name = "toolz-${version}";
-    version = "0.8.2";
-
-    src = pkgs.fetchurl{
-      url = "mirror://pypi/t/toolz/toolz-${version}.tar.gz";
-      sha256 = "0l3czks4xy37i8099waxk2fdz5g0k1dwys2mkhlxc0b0886cj4sa";
-    };
-
-    buildInputs = with self; [ nose ];
-
-    checkPhase = ''
-      # https://github.com/pytoolz/toolz/issues/357
-      rm toolz/tests/test_serialization.py
-      nosetests toolz/tests
-    '';
-
-    meta = {
-      homepage = "http://github.com/pytoolz/toolz/";
-      description = "List processing tools and functional utilities";
-      license = "licenses.bsd3";
-      maintainers = with maintainers; [ fridh ];
-    };
-  };
+  toolz = callPackage ../development/python-modules/toolz { };
 
   tox = buildPythonPackage rec {
     name = "tox-${version}";