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/xpath-expressions/default.nix

@@ -0,0 +1,46 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, lxml
+, poetry-core
+, pythonOlder
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "xpath-expressions";
+  version = "1.1.0";
+  disabled = pythonOlder "3.5";
+  format = "pyproject";
+
+  src = fetchFromGitHub {
+    owner = "orf";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "0l289iw2zmzxyfi3g2z7b917vmsaz47h5jp871zvykpmpigc632h";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  checkInputs = [
+    lxml
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    # Was fixed upstream but not released
+    substituteInPlace pyproject.toml \
+      --replace "poetry.masonry.api" "poetry.core.masonry.api"
+  '';
+
+  pythonImportsCheck = [ "xpath" ];
+
+  meta = with lib; {
+    description = "Python module to handle XPath expressions";
+    homepage = "https://github.com/orf/xpath-expressions";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+  };
+}