https://bugs.winehq.org/show_bug.cgi?id=51610
--- Comment #2 from Fabian Maurer dark.shadow4@web.de --- I think I know what breaks x64 programs compared to x86: https://github.com/cygwin/cygwin/blob/44eb4163234089e8830b018dbcf6a08333eab2... For x64 there is special logic in cygwin. When editing the linked file to run the #else path, programs work better under wine.