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/yarl/default.nix

@@ -0,0 +1,52 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, idna
+, multidict
+, typing-extensions
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "yarl";
+  version = "1.7.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-RTmbRtYMJTMnpGDpmFZ1IAn87l9dPICy98DK4cONVt0=";
+  };
+
+  postPatch = ''
+    sed -i '/^addopts/d' setup.cfg
+  '';
+
+  propagatedBuildInputs = [
+    idna
+    multidict
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    typing-extensions
+  ];
+
+  preCheck = ''
+    # don't import yarl from ./ so the C extension is available
+    pushd tests
+  '';
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  postCheck = ''
+    popd
+  '';
+
+  pythonImportsCheck = [ "yarl" ];
+
+  meta = with lib; {
+    description = "Yet another URL library";
+    homepage = "https://github.com/aio-libs/yarl";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ dotlambda ];
+  };
+}