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/flake8/default.nix

@@ -0,0 +1,62 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, configparser
+, enum34
+, mccabe
+, pycodestyle
+, pyflakes
+, functools32
+, typing
+, importlib-metadata
+, mock
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "flake8";
+  version = "4.0.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "03c7mnk34wfz7a0m5zq0273y94awz69fy5iww8alh4a4v96h6vl0";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.cfg \
+      --replace "mccabe>=0.6.0,<0.7.0" "mccabe>=0.7.0,<0.8.0"
+  '';
+
+  propagatedBuildInputs = [
+    pyflakes
+    pycodestyle
+    mccabe
+  ] ++ lib.optionals (pythonOlder "3.2") [
+    configparser
+    functools32
+  ] ++ lib.optionals (pythonOlder "3.4") [
+    enum34
+  ] ++ lib.optionals (pythonOlder "3.5") [
+    typing
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    importlib-metadata
+  ];
+
+  # Tests fail on Python 3.7 due to importlib using a deprecated interface
+  doCheck = !(pythonOlder "3.8");
+
+  checkInputs = [
+    mock
+    pytestCheckHook
+  ];
+
+  disabled = pythonOlder "3.6";
+
+  meta = with lib; {
+    description = "Flake8 is a wrapper around pyflakes, pycodestyle and mccabe.";
+    homepage = "https://github.com/pycqa/flake8";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}