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/xknx/default.nix

@@ -0,0 +1,57 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, cryptography
+, ifaddr
+, voluptuous
+, pyyaml
+, pytest-asyncio
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "xknx";
+  version = "0.21.4";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.8";
+
+  src = fetchFromGitHub {
+    owner = "XKNX";
+    repo = pname;
+    rev = "refs/tags/${version}";
+    sha256 = "sha256-eKbEeW+pa8lUbbzcvexURa6raN3HFzIWjwqE3L80KTY=";
+  };
+
+  propagatedBuildInputs = [
+    cryptography
+    ifaddr
+  ];
+
+  checkInputs = [
+    pytest-asyncio
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "xknx"
+  ];
+
+  disabledTests = [
+    # Test requires network access
+    "test_scan_timeout"
+  ];
+
+  meta = with lib; {
+    description = "KNX Library Written in Python";
+    longDescription = ''
+      XKNX is an asynchronous Python library for reading and writing KNX/IP
+      packets. It provides support for KNX/IP routing and tunneling devices.
+    '';
+    homepage = "https://github.com/XKNX/xknx";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+    platforms = platforms.linux;
+  };
+}