How to set a custom context for NanMakeCallback->Call

Question

NAN 1.7.0 introduced an optional target parameter for NanCallbackCall. This parameter allows you to set the context for the callback i.e. this.

However not matter what I do the this value in my JavaScript callback is always the default Global context. I would expect the following to make foo available on this in my JavaScript callback.

Local<Object> context = NanNew<Object>();
context->Set(NanNew<String>("foo"), NanNew<String>("bar"));
myNanCallback->Call(context, argv_v8.size(), &argv_v8[0]);