Currently, dropbear-initramfs has this in its Depends: line:

 Depends: busybox | busybox-static, ...

The first alternative is already sufficient, because busybox-static
package has Provides: busybox and can satisfy this dependency.

However, we're changing busybox-static package by renaming the binary
to be busybox-static (see #1147074), and the new busybox-static will
not be compatible with dropbear-initramfs usage anymore.

Please remove busybox-static alternative from the dependencies to
allow us to proceed.  This is a trivial change.

Thanks,

/mjt