Resolving Generic Interface with Autofac

Given the following code, how do I resolve the right SomeInstance in autofac?

public class BaseClass {}

public class SubClass1 : BaseClass {}

public class SubClass2 : BaseClass {}

public interface IGenericInterface<T> where T : BaseClass {}

public class SomeInstance1<T> : IGenericInterface<T> where T : SubClass1

public class SomeInstance2<T> : IGenericInterface<T> where T : SubClass2

I want to choose SomeInstance1 or 2 based on the type of of the generic on the sub classes.

So for example I have a collection of sub classes (SubClass1, 2....) and while iterating over them I want to choose the right SomeInstance class.