[racket] PLaneT hard/development links and multiple versions of racket

I currently am using planet hardlinks for some libraries I am working
on, but this feature does not seem to work well with multiple versions
of racket. Normally each version of racket keeps its own planet cache,
but this does not happen for hardlinks and thus the compiled directory
has the wrong version of the bytecode. Is there a way to have multiple
hardlinks depending on the version of racket?

-Eric