Prince has a bug that causes links between different files to break when Dactyl builds them:
Normalise input filenames to avoid missing links on Windows. (ref, ref)
As long as that bug is on their roadmap and not done, linking between files in Dactyl-produced PDFs won't work.
However, it might be possible to work around this by changing the current working directory before running Prince so the paths don't have to include any slashes.
mDuo13
commented
7 years ago
Prince has a bug that causes links between different files to break when Dactyl builds them:
As long as that bug is on their roadmap and not done, linking between files in Dactyl-produced PDFs won't work.
However, it might be possible to work around this by changing the current working directory before running Prince so the paths don't have to include any slashes.