Hi,
wineps/generic.ppd isn't installed anymore since a couple weeks ago (didn't had time yet to pinpoint exact patch). I think it's because only __install-lib__ and __install-dev__ is done in dlls/ now, and not __install__, which is the target actually installing wineps/generic.ppd.
A quick'n dirty way is to run make -C dlls/wineps install after make install but it should really be fixed properly I guess.
Vincent