laravel eloquent using a scope to compare 2 columns

I have 2 date columns in the users table of laravel 5.0. The schema is:

users * id * email * activated_on * deactivated_on

I want to query if the user is activated so I have the following scope function:

public function scopeActivated($query){
    $now = date('Y-m-d');
    return $query->whereBetween('activated_on', ['deactivated_on', $now]);
}

The query that this generates is that it compares the column activated_on to the string deactivated_on.

Is there a way to tell eloquent to compare the 2 columns?

via Chebli Mohamed