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/icontract/default.nix

@@ -0,0 +1,78 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchFromGitHub
+, asttokens
+, typing-extensions
+, pytestCheckHook
+, yapf
+, docutils
+, pygments
+, dpcontracts
+, tabulate
+, py-cpuinfo
+, typeguard
+, astor
+, numpy
+, asyncstdlib
+}:
+
+buildPythonPackage rec {
+  pname = "icontract";
+  version = "2.6.1";
+  format = "setuptools";
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "Parquery";
+    repo = pname;
+    rev = "refs/tags/v${version}";
+    hash = "sha256-QyuegyjVyRLQS0DjBJXpTDNeBM7LigGJ5cztVOO7e3Y=";
+  };
+
+  preCheck = ''
+    # we don't want to use the precommit.py script to build the package.
+    # For the tests to succeed, "ICONTRACT_SLOW" needs to be set.
+    # see https://github.com/Parquery/icontract/blob/aaeb1b06780a34b05743377e4cb2458780e808d3/precommit.py#L57
+    export ICONTRACT_SLOW=1
+  '';
+
+
+  propagatedBuildInputs = [
+    asttokens
+    typing-extensions
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+    yapf
+    docutils
+    pygments
+    dpcontracts
+    tabulate
+    py-cpuinfo
+    typeguard
+    astor
+    numpy
+    asyncstdlib
+  ];
+
+  disabledTestPaths = [
+    # needs an old version of deal to comply with the tests
+    # see https://github.com/Parquery/icontract/issues/244
+    "tests_with_others/test_deal.py"
+    # mypy decorator checks don't pass. For some reaseon mypy
+    # doesn't check the python file provided in the test.
+    "tests/test_mypy_decorators.py"
+  ];
+
+  pythonImportsCheck = [ "icontract" ];
+
+  meta = with lib; {
+    description = "Provide design-by-contract with informative violation messages";
+    homepage = "https://github.com/Parquery/icontract";
+    changelog = "https://github.com/Parquery/icontract/blob/master/CHANGELOG.rst";
+    license = licenses.mit;
+    maintainers = with maintainers; [ gador ];
+  };
+}