Remove it and add your own.
Your own should provide you the freedom to install your busybox but still keep locking the rest. Then it won't break anything more than what busybox itself might break ( and this is only after installing it that we can know..)
At the moment, you have an uninstallable package. Either you don't publish or you make everything so that it installs?

For testing, you can ask power users or developers to install it with dpkg and setting the correct option to don't care about conflicts and dependency breaking. It should install.