https://bugs.winehq.org/show_bug.cgi?id=55964
--- Comment #7 from Esme Povirk madewokherd@gmail.com --- This should fix it for the libmono dll's: https://github.com/madewokherd/wine-mono/commit/2943bec61e8345f5ee91b13022e2...
For the other dll's, I think it will be better to just remove the -arch from the name and move them to architecture-specific directories.