https://bugs.winehq.org/show_bug.cgi?id=54243
--- Comment #2 from Matthew Ogilvie mmogilvi2+wine@gmail.com --- I hadn't heard of cdemu, but from its wikipedia summary combined with my bug analysis above, I expect that whether it works would be entirely dependent on whether I change the "d::" symlink to point to the virtual device it creates, or leave it pointing directly at the underlying .iso, for the same reason that my "WORKAROUND" works.