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/parsel/default.nix

@@ -0,0 +1,65 @@
+{ lib
+, buildPythonPackage
+, cssselect
+, fetchPypi
+, functools32
+, isPy27
+, lxml
+, pytestCheckHook
+, six
+, w3lib
+}:
+
+buildPythonPackage rec {
+  pname = "parsel";
+  version = "1.6.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0yawf9r3r863lwxj0n89i7h3n8xjbsl5b7n6xg76r68scl5yzvvh";
+  };
+
+  propagatedBuildInputs = [
+    cssselect
+    lxml
+    six
+    w3lib
+  ] ++ lib.optionals isPy27 [
+    functools32
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "'pytest-runner'," ""
+  '';
+
+  disabledTests = [
+    # Test are out-dated and are failing (AssertionError: Lists differ: ...)
+    # https://github.com/scrapy/parsel/pull/174
+    "test_differences_parsing_xml_vs_html"
+    "test_nested_selectors"
+    "test_re"
+    "test_replacement_null_char_from_body"
+    "test_select_on_text_nodes"
+    "test_selector_get_alias"
+    "test_selector_getall_alias"
+    "test_selector_over_text"
+    "test_selectorlist_get_alias"
+    "test_selectorlist_getall_alias"
+    "test_slicing"
+    "test_text_pseudo_element"
+  ];
+
+  pythonImportsCheck = [ "parsel" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/scrapy/parsel";
+    description = "Python library to extract data from HTML and XML using XPath and CSS selectors";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ fab ];
+  };
+}