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/pykka/default.nix

@@ -0,0 +1,39 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchFromGitHub
+, poetry-core
+, pytestCheckHook
+, pytest-mock
+}:
+
+buildPythonPackage rec {
+  pname = "pykka";
+  version = "3.1.1";
+  format = "pyproject";
+  disabled = pythonOlder "3.6.1";
+
+  src = fetchFromGitHub {
+    owner = "jodal";
+    repo = pname;
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-bvRjFpXufGygTgPfEOJOCXFbMy3dNlrTHlGoaIG/Fbs=";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+    pytest-mock
+  ];
+
+  meta = with lib; {
+    homepage = "https://www.pykka.org/";
+    description = "A Python implementation of the actor model";
+    changelog = "https://github.com/jodal/pykka/blob/v${version}/docs/changes.rst";
+    maintainers = with maintainers; [ marsam ];
+    license = licenses.asl20;
+  };
+}