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/defcon/default.nix

@@ -0,0 +1,41 @@
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
+, fonttools, setuptools-scm
+, pytest, pytest-runner, lxml, fs, unicodedata2, fontpens
+}:
+
+buildPythonPackage rec {
+  pname = "defcon";
+  version = "0.10.1";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-+nlk9xG3mOCS4xHzp54J/V+he7HNMg1aMgFeTFTrMHA=";
+    extension = "zip";
+  };
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    fonttools
+  ];
+
+  checkInputs = [
+    pytest
+    pytest-runner
+    lxml
+    fs
+    unicodedata2
+    fontpens
+  ];
+
+  meta = with lib; {
+    description = "A set of UFO based objects for use in font editing applications";
+    homepage = "https://github.com/robotools/defcon";
+    license = licenses.mit;
+    maintainers = [ maintainers.sternenseemann ];
+  };
+}