Consider the scenario: I have a simple scala project managed by sbt, in a directory called
mv foo bar
As it turns out, there's some work in progress to make incremental compilation results cacheable. Here's the relevant PR: https://github.com/sbt/zinc/pull/216.
Also, there's an issue (being discussed at the time of this writing) about making zinc's analysis completely machine independent. See https://github.com/sbt/zinc/issues/218.