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/FormEncode/default.nix

@@ -0,0 +1,49 @@
+{ lib
+, buildPythonPackage
+, isPy27
+, fetchPypi
+, setuptools-scm
+, six
+, dnspython
+, pycountry
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "FormEncode";
+  version = "2.0.1";
+
+  disabled = isPy27;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "8f2974112c2557839d5bae8b76490104c03830785d923abbdef148bf3f710035";
+  };
+
+  postPatch = ''
+    sed -i '/setuptools_scm_git_archive/d' setup.py
+  '';
+
+  nativeBuildInputs = [ setuptools-scm ];
+
+  propagatedBuildInputs = [ six ];
+
+  checkInputs = [
+    dnspython
+    pycountry
+    pytestCheckHook
+  ];
+
+  disabledTests = [
+    # requires network for DNS resolution
+    "test_doctests"
+    "test_unicode_ascii_subgroup"
+  ];
+
+  meta = with lib; {
+    description = "FormEncode validates and converts nested structures";
+    homepage = "http://formencode.org";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}