Can't add a module to the system

Hi everyone,
my goal is to add a new module to the examplerocketsystem.
I generate a configuration with DefaultSmallConfiguration + WithJtagDTM and i have the verilog file.
Now i want to add another module into the system, but i can't do it.
When i modify the src files of the rocket chip generator, it remains equal to the previous configuration.
Please, help me

Start with the configuration entry points DefaultSmallConfiguration and WithJtagDTM, then trace how the generated Verilog is produced from the rocket-chip generator sources. Determine why modifying src files does not change the previous configuration and identify how an additional module can be included. Done means the generated system contains the new module.

Written by the indexing model from the issue text.