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/pywlroots/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, python
+, cffi
+, pkg-config
+, libxkbcommon
+, libinput
+, pixman
+, pythonOlder
+, udev
+, wlroots
+, wayland
+, pywayland
+, xkbcommon
+, xorg
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "pywlroots";
+  version = "0.15.15";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "Xg1Bd9Q6XV/+vuJH9Huiq2+igdAE/RS8yTvLeJz1l34=";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  propagatedNativeBuildInputs = [ cffi ];
+  buildInputs = [ libinput libxkbcommon pixman xorg.libxcb udev wayland wlroots ];
+  propagatedBuildInputs = [ cffi pywayland xkbcommon ];
+  checkInputs = [ pytestCheckHook ];
+
+  postBuild = ''
+    ${python.interpreter} wlroots/ffi_build.py
+  '';
+
+  pythonImportsCheck = [ "wlroots" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/flacjacket/pywlroots";
+    description = "Python bindings to wlroots using cffi";
+    license = licenses.ncsa;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ chvp ];
+  };
+}