A Debian CD or DVD ISO file - here is an example - consists of many different packages containing software licenses under various licenses such as GPLv2, GPLv3, BSD, and a lot of other licenses.
The selection of packages that went into a Debian ISO is a process that requires skill (miss some packages and you won't have a working desktop), originality and therefore could be considered a derivative work which has its own copyright, right?
A Debian ISO is created with a build script. Such a build script has yet another copyright and license.
The process of creating such an ISO is not simple, so is also copyrighted?
Ubuntu says it is an "aggregate work".
Ubuntu is an aggregate work of many works, each covered by their own license(s). For the purposes of determining what you can do with specific works in Ubuntu, this policy should be read together with the license(s) of the relevant packages. For the avoidance of doubt, where any other license grants rights, this policy does not modify or reduce those rights under those licenses.
By that logic, Debian - or more specifically - a Debian ISO (let's say Live ISO to simplify the discussion) - also is an "aggregate work"?
What is the license of the Debian Live ISO binary?