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/rtmixer/default.nix

@@ -0,0 +1,40 @@
+{ fetchFromGitHub
+, buildPythonPackage
+, isPy27
+, cython
+, portaudio
+, cffi
+, pa-ringbuffer
+, sounddevice
+, lib
+}:
+
+buildPythonPackage rec {
+  pname = "rtmixer";
+  version = "0.1.1";
+  disabled = isPy27;
+
+  src = fetchFromGitHub {
+    owner = "spatialaudio";
+    repo = "python-rtmixer";
+    rev = version;
+    sha256 = "1bvgzzxiypvvb3qacbcry6761x9sk3dnx7jga7pli63f69vakg4y";
+    fetchSubmodules = true;
+  };
+
+  buildInputs = [ portaudio ];
+  nativeBuildInputs = [ cython ];
+
+  propagatedBuildInputs = [
+    cffi
+    pa-ringbuffer
+    sounddevice
+  ];
+
+  meta = {
+    description = "Reliable low-latency audio playback and recording with Python, using PortAudio via the sounddevice module";
+    homepage = "https://python-rtmixer.readthedocs.io";
+    maintainers = with lib.maintainers; [ laikq ];
+    license = lib.licenses.mit;
+  };
+}