Copyright law only _explicitly_ grants a monopoly on preparation ofConceded. Altough .br's "computer programs" law explicitly says that you can reserve, in a license to create derivative works, all the rights over the derivative works.
derivative works. However, it is trivial, and overwhelmingly common,
for a copyright owner to grant a license to create a derivative work
that is conditional on how the licensee agrees to distribute (or not
distribute) the derivative work.
Michael Poole