That is, admittedly, something Rust has not prioritized. I think it was probably the right decision given how successful the cargo approach has been in terms of bootstrapping a language community.
There are some very talented people thinking about the interoperability story, but it is also hard so they haven't committed to a solution prematurely.
There are some very talented people thinking about the interoperability story, but it is also hard so they haven't committed to a solution prematurely.