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/pyfakefs/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, stdenv
+, buildPythonPackage
+, fetchPypi
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  version = "4.5.6";
+  pname = "pyfakefs";
+  disabled = pythonOlder "3.5";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-kU17+ZRAbPvv7gtNRZGPYMFbQGr+k/gZSoBNpaRQqCI=";
+  };
+
+  postPatch = ''
+    # test doesn't work in sandbox
+    substituteInPlace pyfakefs/tests/fake_filesystem_test.py \
+      --replace "test_expand_root" "notest_expand_root"
+    substituteInPlace pyfakefs/tests/fake_os_test.py \
+      --replace "test_path_links_not_resolved" "notest_path_links_not_resolved" \
+      --replace "test_append_mode_tell_linux_windows" "notest_append_mode_tell_linux_windows"
+  '' + (lib.optionalString stdenv.isDarwin ''
+    # this test fails on darwin due to case-insensitive file system
+    substituteInPlace pyfakefs/tests/fake_os_test.py \
+      --replace "test_rename_dir_to_existing_dir" "notest_rename_dir_to_existing_dir"
+  '');
+
+  checkInputs = [ pytestCheckHook ];
+  # https://github.com/jmcgeheeiv/pyfakefs/issues/581 (OSError: [Errno 9] Bad file descriptor)
+  disabledTests = [ "test_open_existing_pipe" ];
+  pythonImportsCheck = [ "pyfakefs" ];
+
+  meta = with lib; {
+    description = "Fake file system that mocks the Python file system modules";
+    homepage = "http://pyfakefs.org/";
+    changelog = "https://github.com/jmcgeheeiv/pyfakefs/blob/master/CHANGES.md";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ gebner ];
+  };
+}