diff --git a/pkgs/development/python-modules/ujson/default.nix b/pkgs/development/python-modules/ujson/default.nix
new file mode 100644
index 000000000000..a9d68978c3b0
--- /dev/null
+++ b/pkgs/development/python-modules/ujson/default.nix
@@ -0,0 +1,23 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, isPyPy
+}:
+
+buildPythonPackage rec {
+  pname = "ujson";
+  version = "1.35";
+  disabled = isPyPy;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "11jz5wi7mbgqcsz52iqhpyykiaasila4lq8cmc2d54bfa3jp6q7n";
+  };
+
+  meta = with stdenv.lib; {
+    homepage = https://pypi.python.org/pypi/ujson;
+    description = "Ultra fast JSON encoder and decoder for Python";
+    license = licenses.bsd3;
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8874569c2400..6e0c7ea51515 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4278,23 +4278,7 @@ in {
 
   carbon = callPackage ../development/python-modules/carbon { };
 
-  ujson = buildPythonPackage rec {
-    name = "ujson-1.35";
-
-    disabled = isPyPy;
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/u/ujson/${name}.tar.gz";
-      sha256 = "11jz5wi7mbgqcsz52iqhpyykiaasila4lq8cmc2d54bfa3jp6q7n";
-    };
-
-    meta = {
-      homepage = https://pypi.python.org/pypi/ujson;
-      description = "Ultra fast JSON encoder and decoder for Python";
-      license = licenses.bsd3;
-    };
-  };
-
+  ujson = callPackage ../development/python-modules/ujson { };
 
   unidecode = callPackage ../development/python-modules/unidecode {};