make: *** 没有规则可以创建目标

make CONFIG_PREFIG=/mnt/exec/ mybusybox1
make: *** 没有规则可以创建目标“mybusybox1”。 停止。

太弱了，
make CONFIG_PREFIG=/mnt/exec/mybusybox1 install
*
*
*
  ./_install//usr/sbin/fbset -> ../../bin/busybox
  ./_install//usr/sbin/ftpd -> ../../bin/busybox
  ./_install//usr/sbin/loadfont -> ../../bin/busybox
  ./_install//usr/sbin/lpd -> ../../bin/busybox
  ./_install//usr/sbin/remove-shell -> ../../bin/busybox
  ./_install//usr/sbin/setfont -> ../../bin/busybox
  ./_install//usr/sbin/setlogcons -> ../../bin/busybox
  ./_install//usr/sbin/tftpd -> ../../bin/busybox
  ./_install//usr/sbin/udhcpd -> ../../bin/busybox


--------------------------------------------------
You will probably need to make your busybox binary
setuid root to ensure all configured applets will
work properly.
--------------------------------------------------

ok！