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/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, asgiref
+, django
+, daphne
+, pytest-asyncio
+, pytest-django
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "channels";
+  version = "3.0.4";
+
+  src = fetchFromGitHub {
+    owner = "django";
+    repo = pname;
+    rev = version;
+    sha256 = "0jdylcb77n04rqyzg9v6qfzaxp1dnvdvnxddwh3x1qazw3csi5y2";
+  };
+
+  propagatedBuildInputs = [
+    asgiref
+    django
+    daphne
+  ];
+
+  checkInputs = [
+    pytest-asyncio
+    pytest-django
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "channels" ];
+
+  meta = with lib; {
+    description = "Brings event-driven capabilities to Django with a channel system";
+    license = licenses.bsd3;
+    homepage = "https://github.com/django/channels";
+    maintainers = with maintainers; [ fab ];
+  };
+}