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/setuptools-rust/pyo3-test/default.nix

@@ -0,0 +1,25 @@
+{ callPackage
+, rustPlatform
+, setuptools-rust
+}:
+
+callPackage ../../../tools/rust/maturin/pyo3-test/generic.nix {
+  # Isolated builds break for this package, because PyO3 is not
+  # in the build root of the Python Package:
+  #
+  # https://github.com/pypa/pip/issues/6276
+  #
+  format = "setuptools";
+
+  nativeBuildInputs = [ setuptools-rust ] ++ (with rustPlatform; [
+    cargoSetupHook
+    rust.cargo
+    rust.rustc
+  ]);
+
+  preConfigure = ''
+    # sourceRoot puts Cargo.lock in the wrong place due to the
+    # example setup.
+    cd examples/word-count
+  '';
+}