Index: lib/ncurses/ncurses/Makefile
===================================================================
--- lib/ncurses/ncurses/Makefile
+++ lib/ncurses/ncurses/Makefile
@@ -350,7 +350,8 @@
 	sh ${NCURSES_DIR}/ncurses/tty/MKexpanded.sh "${CC:N${CCACHE_BIN}} -E" ${CFLAGS} >expanded.c
 
 fallback.c: MKfallback.sh
-	sh ${NCURSES_DIR}/ncurses/tinfo/MKfallback.sh > fallback.c
+	sh -ex ${NCURSES_DIR}/ncurses/tinfo/MKfallback.sh "" "" "" > ${.TARGET}.tmp && \
+	    mv -f ${.TARGET}.tmp ${.TARGET}
 
 # Generated headers
 nomacros.h: MKlib_gen.sh curses.h