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/rtmidi-python/default.nix

@@ -0,0 +1,49 @@
+{ lib
+, stdenv
+, buildPythonPackage
+, fetchPypi
+, cython
+, alsa-lib
+, CoreAudio
+, CoreMIDI
+, CoreServices
+}:
+
+buildPythonPackage rec {
+  pname = "rtmidi-python";
+  version = "0.2.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1wpcaxfpbmsjc78g8841kpixr0a3v6zn0ak058s3mm25kcysp4m0";
+  };
+
+  postPatch = ''
+    rm rtmidi_python.cpp
+  '';
+
+  nativeBuildInputs = [ cython ];
+  buildInputs = lib.optionals stdenv.isLinux [
+    alsa-lib
+  ] ++ lib.optionals stdenv.isDarwin [
+    CoreAudio
+    CoreMIDI
+    CoreServices
+  ];
+
+  setupPyBuildFlags = [ "--from-cython" ];
+
+  # package has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "rtmidi_python"
+  ];
+
+  meta = with lib; {
+    description = "Python wrapper for RtMidi";
+    homepage = "https://github.com/superquadratic/rtmidi-python";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}