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/virtualenv/default.nix

@@ -0,0 +1,90 @@
+{ stdenv
+, lib
+, buildPythonPackage
+, pythonOlder
+, isPy27
+, backports-entry-points-selectable
+, cython
+, distlib
+, fetchPypi
+, filelock
+, flaky
+, importlib-metadata
+, importlib-resources
+, pathlib2
+, platformdirs
+, pytest-freezegun
+, pytest-mock
+, pytest-timeout
+, pytestCheckHook
+, setuptools-scm
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "virtualenv";
+  version = "20.14.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-jltAIDcocSboHM3pQyuVqL5bGdNlhPZJVwYKNIjBHKg=";
+  };
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    backports-entry-points-selectable
+    distlib
+    filelock
+    platformdirs
+    six
+  ] ++ lib.optionals (pythonOlder "3.4" && !stdenv.hostPlatform.isWindows) [
+    pathlib2
+  ] ++ lib.optionals (pythonOlder "3.7") [
+    importlib-resources
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    importlib-metadata
+  ];
+
+  patches = lib.optionals (isPy27) [
+    ./0001-Check-base_prefix-and-base_exec_prefix-for-Python-2.patch
+  ];
+
+  checkInputs = [
+    cython
+    flaky
+    pytest-freezegun
+    pytest-mock
+    pytest-timeout
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    export HOME=$(mktemp -d)
+  '';
+
+  # Ignore tests which require network access
+  disabledTestPaths = [
+    "tests/unit/create/test_creator.py"
+    "tests/unit/seed/embed/test_bootstrap_link_via_app_data.py"
+  ];
+
+  disabledTests = [
+    # Permission Error
+    "test_bad_exe_py_info_no_raise"
+  ] ++ lib.optionals isPy27 [
+    "test_python_via_env_var"
+    "test_python_multi_value_prefer_newline_via_env_var"
+  ];
+
+  pythonImportsCheck = [ "virtualenv" ];
+
+  meta = with lib; {
+    description = "A tool to create isolated Python environments";
+    homepage = "http://www.virtualenv.org";
+    license = licenses.mit;
+    maintainers = with maintainers; [ goibhniu ];
+  };
+}