As M2 is becoming better every day, I suppose more projects will start using M2 instead of M1. So the artifacts generated by these projects will be stored in an M2-style repository. However, there will also be projects that want to continue using M1 for a while, but that have dependencies to artifacts created by M2 projects. So M1 should be able to retrieve artifacts from an M2 repository. Remark that I do not want M1 to have all the functionalities of the M2 dependency management (transitive dependencies, POM retrieval, ...). I just want to retrieve the artifact from the M2 repository.