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/channels-redis/default.nix

@@ -0,0 +1,46 @@
+{ lib
+, aioredis
+, asgiref
+, buildPythonPackage
+, channels
+, fetchPypi
+, hiredis
+, msgpack
+, pythonOlder
+, redis
+}:
+
+buildPythonPackage rec {
+  pname = "channels-redis";
+  version = "3.4.0";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit version;
+    pname = "channels_redis";
+    sha256 = "sha256-Xf/UzBYXQSW9QEP8j+dGLKdAPPgB1Zqfp0EO0QH6alc=";
+  };
+
+  buildInputs = [ redis hiredis ];
+
+  propagatedBuildInputs = [ channels msgpack aioredis asgiref ];
+
+  # Fails with : ConnectionRefusedError: [Errno 111] Connect call failed ('127.0.0.1', 6379)
+  # (even with a local Redis instance running)
+  doCheck = false;
+
+  postPatch = ''
+    sed -i "s/msgpack~=0.6.0/msgpack/" setup.py
+    sed -i "s/aioredis~=1.0/aioredis/" setup.py
+  '';
+
+  pythonImportsCheck = [ "channels_redis" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/django/channels_redis/";
+    description = "Redis-backed ASGI channel layer implementation";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ mmai ];
+  };
+}