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/flux-led/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, webcolors
+, pythonOlder
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "flux-led";
+  version = "0.28.30";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "Danielhiversen";
+    repo = "flux_led";
+    rev = "refs/tags/${version}";
+    sha256 = "sha256-ujox3Q8oyPw8+SBdF9O7ezu8FC/NnWxeSGW8Nfh7tZ8=";
+  };
+
+  propagatedBuildInputs = [
+    webcolors
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace '"pytest-runner>=5.2",' ""
+  '';
+
+  pytestFlagsArray = [
+    "tests.py"
+  ];
+
+  pythonImportsCheck = [
+    "flux_led"
+  ];
+
+  meta = with lib; {
+    description = "Python library to communicate with the flux_led smart bulbs";
+    homepage = "https://github.com/Danielhiversen/flux_led";
+    license = licenses.lgpl3Plus;
+    maintainers = with maintainers; [ colemickens ];
+    platforms = platforms.linux;
+  };
+}