diff --git a/pkgs/development/python-modules/pymongo/2_9_1.nix b/pkgs/development/python-modules/pymongo/2_9_1.nix
new file mode 100644
index 00000000000..181d99a93f6
--- /dev/null
+++ b/pkgs/development/python-modules/pymongo/2_9_1.nix
@@ -0,0 +1,24 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "pymongo";
+  version = "2.9.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1nrr1fxyrlxd69bgxl7bvaj2j4z7v3zaciij5sbhxg0vqiz6ny50";
+  };
+
+  # Tests call a running mongodb instance
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/mongodb/mongo-python-driver;
+    license = licenses.asl20;
+    description = "Python driver for MongoDB ";
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 86055285d4a..bef4cb4883d 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3487,24 +3487,7 @@ in {
 
   pymongo = callPackage ../development/python-modules/pymongo {};
 
-  pymongo_2_9_1 = buildPythonPackage rec {
-    name = "pymongo-2.9.1";
-    version = "2.9.1";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/p/pymongo/${name}.tar.gz";
-      sha256 = "1nrr1fxyrlxd69bgxl7bvaj2j4z7v3zaciij5sbhxg0vqiz6ny50";
-    };
-
-    # Tests call a running mongodb instance
-    doCheck = false;
-
-    meta = {
-      homepage = https://github.com/mongodb/mongo-python-driver;
-      license = licenses.asl20;
-      description = "Python driver for MongoDB ";
-    };
-  };
+  pymongo_2_9_1 = callPackage ../development/python-modules/pymongo/2_9_1.nix { };
 
   pyperclip = callPackage ../development/python-modules/pyperclip { };