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/asyncio_mqtt/default.nix

@@ -0,0 +1,37 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchPypi
+, async_generator
+, paho-mqtt
+}:
+
+buildPythonPackage rec {
+  pname = "asyncio-mqtt";
+  version = "0.12.1";
+  format = "setuptools";
+
+  src = fetchPypi {
+    pname = "asyncio_mqtt";
+    inherit version;
+    sha256 = "sha256-bb+FpF+U0m50ZUEWgK2jlHtQVG6YII1dUuegp+16fDg=";
+  };
+
+  propagatedBuildInputs = [
+    paho-mqtt
+  ] ++ lib.optional (pythonOlder "3.7") [
+    async_generator
+  ];
+
+  doCheck = false; # no tests
+
+  pythonImportsCheck = [ "asyncio_mqtt" ];
+
+  meta = with lib; {
+    description = "Idomatic asyncio wrapper around paho-mqtt";
+    homepage = "https://github.com/sbtinstruments/asyncio-mqtt";
+    license = licenses.bsd3;
+    changelog = "https://github.com/sbtinstruments/asyncio-mqtt/blob/master/CHANGELOG.md";
+    maintainers = with maintainers; [ hexa ];
+  };
+}