diff --git a/pkgs/development/python-modules/mwlib-ext/default.nix b/pkgs/development/python-modules/mwlib-ext/default.nix
new file mode 100644
index 00000000000..cfcbdc2d0ac
--- /dev/null
+++ b/pkgs/development/python-modules/mwlib-ext/default.nix
@@ -0,0 +1,24 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+}:
+
+buildPythonPackage rec {
+  version = "0.13.2";
+  pname = "mwlib.ext";
+  disabled = isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    extension = "zip";
+    sha256 = "9229193ee719568d482192d9d913b3c4bb96af7c589d6c31ed4a62caf5054278";
+  };
+
+  meta = with stdenv.lib; {
+    description = "Dependencies for mwlib markup";
+    homepage = "http://pediapress.com/code/";
+    license = licenses.bsd3;
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 1c430cc3311..6295aa27b32 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1978,22 +1978,7 @@ in {
 
   mwlib = callPackage ../development/python-modules/mwlib { };
 
-  mwlib-ext = buildPythonPackage rec {
-    version = "0.13.2";
-    name = "mwlib.ext-${version}";
-    disabled = isPy3k;
-
-    src = pkgs.fetchurl {
-      url = "http://pypi.pediapress.com/packages/mirror/${name}.zip";
-      sha256 = "9229193ee719568d482192d9d913b3c4bb96af7c589d6c31ed4a62caf5054278";
-    };
-
-    meta = {
-      description = "Dependencies for mwlib markup";
-      homepage = "http://pediapress.com/code/";
-      license = licenses.bsd3;
-    };
-  };
+  mwlib-ext = callPackage ../development/python-modules/mwlib-ext { };
 
   mwlib-rl = buildPythonPackage rec {
     version = "0.14.6";