https://bugs.winehq.org/show_bug.cgi?id=43193
--- Comment #7 from Austin English austinenglish@gmail.com --- (In reply to Dan Kegel from comment #5)
Amusingly, nansi.sys is an ms-dos device driver I wrote circa 1986 :-)
And you have the source available: http://www.kegel.com/nansi/