http://bugs.winehq.org/show_bug.cgi?id=25207
--- Comment #11 from Richard Russell richard@rtrussell.co.uk --- The destination directory requiring to be created may be of the form '....\dir1\dir2\dir3' (where neither dir1 nor dir2 exist), in other words it may require iteratively creating new subdirectories until the required 'level' is reached.
The proposed patch appears only to call CreateDirectoryW which, unless I am mistaken, will not achieve that.