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/opentracing/default.nix

@@ -0,0 +1,39 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy27
+, futures ? null
+, gevent
+, mock
+, pytestCheckHook
+, tornado
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "opentracing";
+  version = "2.4.0";
+  format = "setuptools";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "a173117e6ef580d55874734d1fa7ecb6f3655160b8b8974a2a1e98e5ec9c840d";
+  };
+
+  propagatedBuildInputs = lib.optional isPy27 futures;
+
+  checkInputs = [
+    gevent
+    mock
+    pytestCheckHook
+    six
+    tornado
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/opentracing/opentracing-python";
+    description = "Platform API for OpenTracing";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ rakesh4g ];
+  };
+}