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/typing-extensions/default.nix

@@ -0,0 +1,45 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, flit-core
+, python
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "typing-extensions";
+  version = "4.1.1";
+  format = "pyproject";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    pname = "typing_extensions";
+    inherit version;
+    hash = "sha256-GpRi3MM0enmx8cAnH7556ERYC7WYuvoe0gi5TaPNzUI=";
+  };
+
+  nativeBuildInputs = [
+    flit-core
+  ];
+
+  postPatch = ''
+    # Remove metadata for README which are outdated
+    sed -i -e '11,24d' pyproject.toml
+  '';
+
+  # Tests are not part of PyPI releases. GitHub source can't be used
+  # as it ends with an infinite recursion
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "typing_extensions"
+  ];
+
+  meta = with lib; {
+    description = "Backported and Experimental Type Hints for Python 3.5+";
+    homepage = "https://github.com/python/typing";
+    license = licenses.psfl;
+    maintainers = with maintainers; [ pmiddend ];
+  };
+}