For the Dune Developer Preview program, we would like to have the cache enabled by default to save bandwidth when you are trying to install packages. This modification would respect the following:

1. If there is a value in the configuration, the CLI or in the environment, we want to make sure this one is used.
2. Otherwise, the cache would be enabled by default at configure time only for the developer preview executable.

A solution to this would be to parametrize the default solution using some flags and enabled them (it?) at configure time.

The first proposition can be found on #10710