Well, I am not sure if this has to do with Iceberg itself, because Iceberg does nothing with dependencies.
But I am not sure that a ConfigurationOfXXX really has information of only one package. Normally you will have only one configuration for each project, am I wrong?
Then the configuration specifies (among other stuff) dependencies between the parts (packages) of your project... I think this is right.
If you depend in another project, then you should not depend in specific packages but in another configuration.
The problem here is that we are (at least Iceberg is) assuming a correlation between project and repository, because in fact Iceberg handles repositories. If a project would be spawn in several repositories, at least now Iceberg can't do anything about it, it will treat them as independent "projects". I am not sure about changing this logic in the near future, and also we should think if that is not a Cargo/Metacello feature.��