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/cfn-flip/default.nix

@@ -0,0 +1,55 @@
+{ lib
+, buildPythonPackage
+, click
+, fetchFromGitHub
+, pytestCheckHook
+, pythonOlder
+, pyyaml
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "cfn-flip";
+  version = "1.3.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "awslabs";
+    repo = "aws-cfn-template-flip";
+    rev = version;
+    hash = "sha256-1cV0mHc6+P0CbnLIMSSwNEzDB+1QzNjioH/EoIo40xU=";
+  };
+
+  propagatedBuildInputs = [
+    click
+    pyyaml
+    six
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    sed -i "/--cov/d" tox.ini
+  '';
+
+  disabledTests = [
+    # TypeError: load() missing 1 required positional argument: 'Loader'
+    "test_flip_to_yaml_with_longhand_functions"
+    "test_yaml_no_ordered_dict"
+  ];
+
+  pythonImportsCheck = [
+    "cfn_flip"
+  ];
+
+  meta = with lib; {
+    description = "Tool for converting AWS CloudFormation templates between JSON and YAML formats";
+    homepage = "https://github.com/awslabs/aws-cfn-template-flip";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ kamadorueda psyanticy ];
+  };
+}