Azure Function Queue Trigger Adding Nuget Package

I'm using Azure Function through the Azure Portal for Queue Triggers and I want to add a NuGet Package to it.

There is only two files "run.csx" & "function.json"

The function.json just contains the binding information. However, how do I add a NuGet package such as "Azure.Messaging.ServiceBus" to that function.json. I can't seem to find a clear document or explanation on how to do so.