Another patch, another question: eyed3's test suite uses an archive of
mp3 files, at least some of which were not produced by the program
authors (there's even a Cypress Hill cover art file in the archive :-)).
I added the archive as a native input, but have no idea if this is OK.
Can such a native input also end up as a cached substitute on hydra?  In
that case, I think Guix would infringe on the copyright of the artists,
and we'd better just disable the tests.

Your thoughts?

thanks!

Thomas