-NetBSD-current's wide curses is good enough -- I'm assuming that any
builtin wide curses which is recognized by pkgsrc/ncursesw/builtin.mk
is fine.
-Set the keyboard mode to raw() explicitely. ncurses seems to do
this in some magical way, didn't find a hint in documentation.
-Explicitely disable widechar support if the pkgsrc option is deselected -
otherwise it gets enabled unwantedly if widechar support is found in the
normal curses lib.

(drochner)