diff --git a/pkgs/development/python-modules/ddt/default.nix b/pkgs/development/python-modules/ddt/default.nix
new file mode 100644
index 000000000000..2fb9e9e990b6
--- /dev/null
+++ b/pkgs/development/python-modules/ddt/default.nix
@@ -0,0 +1,21 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "ddt";
+  version = "1.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "e24ecb7e2cf0bf43fa9d4255d3ae2bd0b7ce30b1d1b89ace7aa68aca1152f37a";
+  };
+
+  meta = with stdenv.lib; {
+    description = "Data-Driven/Decorated Tests, a library to multiply test cases";
+    homepage = https://github.com/txels/ddt;
+    license = licenses.mit;
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 9077587eed16..47281cf65632 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2209,22 +2209,7 @@ in {
 
   chameleon = callPackage ../development/python-modules/chameleon { };
 
-  ddt = buildPythonPackage (rec {
-    name = "ddt-1.0.0";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/d/ddt/${name}.tar.gz";
-      sha256 = "e24ecb7e2cf0bf43fa9d4255d3ae2bd0b7ce30b1d1b89ace7aa68aca1152f37a";
-    };
-
-    meta = {
-      description = "Data-Driven/Decorated Tests, a library to multiply test cases";
-
-      homepage = https://github.com/txels/ddt;
-
-      license = licenses.mit;
-    };
-  });
+  ddt = callPackage ../development/python-modules/ddt { };
 
   descartes = callPackage ../development/python-modules/descartes { };