Netbsd-curses does not provide ncursesw directory, so rewrite this path
--- a/stfl_internals.h	2022-07-08 13:54:46.001545269 +0530
+++ b/stfl_internals.h	2022-07-08 13:54:59.429399293 +0530
@@ -28,7 +28,7 @@
 #endif
 
 #include "stfl.h"
-#include <ncursesw/ncurses.h>
+#include <ncurses.h>
 #include <pthread.h>
 
 struct stfl_widget_type;