bug: relative import dependencies break during proof gen

Suppose that you are working with a workspace with two members, `prover` and `lib` and you provide the path to `prover` for proof generation. `prover`'s main imports from `lib` with a relative path, which gets broken during the proof steps due to how files are moved around.

Solution is simply using an absolute path, but still leaving this issue here as a tracker 👍🏻 