My own profile in existing platform

Hello,

I want to add my own installation profile in a distribution proposed in octopus.

My quesion is:

Do I need to put in "myprofile/modules" all modules that are used in my profile or is that they can be downloaded on demand via a myprofile.make file ?

In this case, when does the myprofile.make will be executed ? :

• when creating a new site on the platform ?
• or when the platform is verified?

Thank you for your help.

Stéphane.