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/tubes/default.nix

@@ -0,0 +1,29 @@
+{ lib, buildPythonPackage, fetchPypi, python
+, characteristic, six, twisted
+}:
+
+buildPythonPackage rec {
+  pname = "tubes";
+  version = "0.2.0";
+
+  src = fetchPypi {
+    pname = "Tubes";
+    inherit version;
+    sha256 = "0sg1gg2002h1xsgxigznr1zk1skwmhss72dzk6iysb9k9kdgymcd";
+  };
+
+  propagatedBuildInputs = [ characteristic six twisted ];
+
+  checkPhase = ''
+    ${python.interpreter} -m twisted.trial -j $NIX_BUILD_CORES tubes
+  '';
+
+  pythonImportsCheck = [ "tubes" ];
+
+  meta = with lib; {
+    description = "a data-processing and flow-control engine for event-driven programs";
+    homepage    = "https://github.com/twisted/tubes";
+    license     = licenses.mit;
+    maintainers = with maintainers; [ exarkun ];
+  };
+}