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/rtoml/default.nix

@@ -0,0 +1,64 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, libiconv
+, pytestCheckHook
+, pythonOlder
+, rustPlatform
+, setuptools-rust
+}:
+
+buildPythonPackage rec {
+  pname = "rtoml";
+  version = "0.7";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "samuelcolvin";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-h4vY63pDkrMHt2X244FssLxHsphsfjNd6gnVFUeZZTY=";
+  };
+
+  cargoDeps = rustPlatform.fetchCargoTarball {
+    inherit src;
+    name = "${pname}-${version}";
+    sha256 = "05fwcs6w023ihw3gyihzbnfwjaqy40d6h0z2yas4kqkkvz9x4f8j";
+  };
+
+  nativeBuildInputs = with rustPlatform; [
+    setuptools-rust
+    rust.rustc
+    rust.cargo
+    cargoSetupHook
+  ];
+
+  buildInputs = [
+    libiconv
+  ];
+
+  pythonImportsCheck = [
+    "rtoml"
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    cd tests
+  '';
+
+  pytestFlagsArray = [
+    "-W"
+    "ignore::DeprecationWarning"
+  ];
+
+  meta = with lib; {
+    description = "Rust based TOML library for Python";
+    homepage = "https://github.com/samuelcolvin/rtoml";
+    license = licenses.mit;
+    maintainers = with maintainers; [ evils ];
+  };
+}