diff --git a/pkgs/development/python-modules/cytoolz/default.nix b/pkgs/development/python-modules/cytoolz/default.nix
new file mode 100644
index 00000000000..dcb4e9474c3
--- /dev/null
+++ b/pkgs/development/python-modules/cytoolz/default.nix
@@ -0,0 +1,37 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPyPy
+, nose
+, toolz
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "cytoolz";
+  version = "0.8.2";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "476a2ad176de5eaef80499b7b43d4f72ba6d23df33d349088dae315e9b31c552";
+  };
+
+  # Extension types
+  disabled = isPyPy;
+
+  checkInputs = [ nose ];
+  propagatedBuildInputs = [ toolz ];
+
+  # Disable failing test https://github.com/pytoolz/cytoolz/issues/97
+  checkPhase = ''
+    NOSE_EXCLUDE=test_curried_exceptions nosetests -v $out/${python.sitePackages}
+  '';
+
+  meta = {
+    homepage = "http://github.com/pytoolz/cytoolz/";
+    description = "Cython implementation of Toolz: High performance functional utilities";
+    license = "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 7245b37c51b..868f156ce82 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3243,33 +3243,7 @@ in {
 
   cython = callPackage ../development/python-modules/Cython { };
 
-  cytoolz = buildPythonPackage rec {
-    name = "cytoolz-${version}";
-    version = "0.8.2";
-
-    src = pkgs.fetchurl{
-      url = "mirror://pypi/c/cytoolz/cytoolz-${version}.tar.gz";
-      sha256 = "476a2ad176de5eaef80499b7b43d4f72ba6d23df33d349088dae315e9b31c552";
-    };
-
-    # Extension types
-    disabled = isPyPy;
-
-    buildInputs = with self; [ nose ];
-    propagatedBuildInputs = with self; [ toolz ];
-
-    # Disable failing test https://github.com/pytoolz/cytoolz/issues/97
-    checkPhase = ''
-      NOSE_EXCLUDE=test_curried_exceptions nosetests -v $out/${python.sitePackages}
-    '';
-
-    meta = {
-      homepage = "http://github.com/pytoolz/cytoolz/";
-      description = "Cython implementation of Toolz: High performance functional utilities";
-      license = "licenses.bsd3";
-      maintainers = with maintainers; [ fridh ];
-    };
-  };
+  cytoolz = callPackage ../development/python-modules/cytoolz { };
 
   cryptacular = buildPythonPackage rec {
     name = "cryptacular-1.4.1";