https://bugs.winehq.org/show_bug.cgi?id=53547
--- Comment #1 from Joel Holdsworth joel@airwebreathe.org.uk --- This has something to do with NT-style GUID drive paths. The installer gets the drive list from FindFirstVolumeW/FindNextVolumeW. We can trigger the fixme with a very simple test like this:
-----------------
#include <windows.h>
int main(int argc, char **argv) { GetDiskFreeSpaceW(L"\\?\Volume{00000000-0000-0000-0000-000000000043}\", NULL, NULL, NULL, NULL); }
-----------------