Just lost my reply due to "Preview" ne "Submit". Oops. I'll keep it short:
Doing this kind of thing would be fragile if attempted for the "general case". I.e. all elements of the "platform X compiler tool chain" matrix. In particular, we'd need a blacklist of libraries to never package. Maybe an interactive front-end that prompts the user to select which of the detected dependencies he really wants, etc.
I'd love to have this even just for some platforms, but in a way that doesn't end up with users plastering "PAR is broken on platform X!" all over the internet if this particular bit of functionality is not available for their favourite OS.