Do I have to GPL all software in a .deb package just because it contains some GPL(v2 in this case) code, even if these things have nothing to do with each other except being distributed in the same installer at the same time?
In more detail: I want to distribute a .deb installer for a product we're smushing together. It is only intended to be installed on this product. It contains a closed-source application and also a Plymouth theme for the OS. Needless to say the two do not interact or depend on each other in any way, since, once is a piece of desktop software, and the other is just a theme for making the OS look pretty on boot/shutdown.
Existing themes seem to be GPLv2, so if I were to modify one to create a new theme that way, I understand I'd need to provide the source and license/copyright to go along with it.
But am I right in thinking, since the theme has nothing to do with the closed-source software other than being in the same .deb installer, it shouldn't affect the licensing of the closed-source software in any way?