It must remain free if you separate it from the software distribution it came with. The license must not place restrictions on other software that is distributed along with the licensed software. For example, the license must not insist that all other programs distributed on the same medium must be open-source software. This isn't permissible for Open Source licenses. Note that there is a difference between derivation and aggregation .
Derivation is when a program actually incorporates part of another program into itself.
This section of the Open Source Definition is concerned with aggregation, not derivation. Section 4 is concerned with derivation. Licenses The GNU GPL, BSD, X Consortium, and Artistic licenses are examples of licenses that we consider conformant to the Open Source Definition. It really belongs in explanatory text, not in the Open Source Definition itself.