There's no guarantee that you can release such a program at all. Things can have conflicting licenses in which case it is simply not valid to have both of them

There's no guarantee that you can release such a program at all. Things can have conflicting licenses in which case it is simply not valid to have both of them at the same time. For example, a strong copyleft requiring all source code to be released, and a library with a binary blob for which source release is impossible or prohibited.