Adjust Trigger module's weight automatically on install.

While trying to install activity with drush, I get the following error:

drush en activity
The following projects will be enabled: trigger, activity
Do you really want to continue? (y/n): y
trigger was enabled successfully.                                    [ok]
activity was enabled successfully.                                   [ok]
In order for proper Pathauto behavior with Activity module, the      [error]
Trigger module's weight needs to be fixed up. Click here to fix
Trigger's weight
An error occurred at function : drush_pm_enable                      [error]

So I installed it without drush...