uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/python-modules/duecredit/default.nix

@@ -0,0 +1,37 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy27
+, contextlib2
+, pytest
+, pytestCheckHook
+, vcrpy
+, citeproc-py
+, requests
+, setuptools
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "duecredit";
+  version = "0.9.1";
+  disabled = isPy27;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "f6192ce9315b35f6a67174761291e61d0831e496e8ff4acbc061731e7604faf8";
+  };
+
+  # bin/duecredit requires setuptools at runtime
+  propagatedBuildInputs = [ citeproc-py requests setuptools six ];
+
+  checkInputs = [ contextlib2 pytest pytestCheckHook vcrpy ];
+  disabledTests = [ "test_io" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/duecredit/duecredit";
+    description = "Simple framework to embed references in code";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ bcdarwin ];
+  };
+}