If you do craft a solution that iterates over "everything", there's probably some prior art to learn from by looking at how the CPAN smoke testers discover and test everything.

You might want to pay particular attention to what the CPAN testers blocklist, because the most common reason for a smoker blocklisting a distribution is when they discover that the build process hangs nastily, or otherwise blocks forever. (I discovered that first hand when a mistake in one of my dists caused some smokers to hang.) Knowing which modules they consider impossible or too expensive to test will help you to avoid the same issues.