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/async-dns/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, poetry-core
+, python
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "async-dns";
+  version = "2.0.0";
+  disabled = pythonOlder "3.6";
+  format = "pyproject";
+
+  src = fetchFromGitHub {
+    owner = "gera2ld";
+    repo = "async_dns";
+    rev = "v${version}";
+    sha256 = "0vn7hxvpzikd7q61a27fwzal4lwsra2063awyr6fjpy6lh3cjdwf";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  checkPhase = ''
+    export HOME=$TMPDIR
+    # Test needs network access
+    rm -r tests/resolver
+    ${python.interpreter} -m unittest
+  '';
+
+  pythonImportsCheck = [ "async_dns" ];
+
+  meta = with lib; {
+    description = "Python DNS library";
+    homepage = "https://github.com/gera2ld/async_dns";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+  };
+}