JQuery checkbox selector which are not in a specific class

I am breaking my head trying to make it work. I think the solution is not that hard to find but my brain will explode soon...

So I have a bunch of div with the class process

Inside each div, I have a variable amount of checkbox.

I want to to trigger an event when all the checkbox are checked BUT the ones inside the last process class.

This is the base

if(!$(':checkbox').not(':checked').length > 0)
{
  //All checkbox are checked
}

So I tried to

if(!$(':checkbox').not('.process:last').not(':checked').length > 0)

But this is not the solution.