https://bugs.winehq.org/show_bug.cgi?id=49840
--- Comment #18 from Zebediah Figura z.figura12@gmail.com --- At least the executable itself apparently can't be inside a separate mount point. That said, I suspect (though haven't tested) that things *will* just work if you manually assign a drive letter to the root of the mounted drive, or to any subdirectory thereof; for example, putting Chromium anywhere inside drive_c will work even if drive_c resides on a different file system than the root.