Bear in mind that /usr may be mounted as read-only on some systems. If there are files in the shared directory that need to be written by the application, they may have to be relocated to /etc, /var, or the user's home directory.
How to relocate？
改写程序。
有没有例子……
没见过。
我看了： https://bbs.archlinux.org/viewtopic.php?pid=1216281
你试试打包时就建立 /opt/nengo/lib/cachedir/packages ，权限777？
额，忘了权限了……
不赞成改权限。用软链接吧。