I need to make ng-model available outside of ng-repeat

untitled

<ul>
    <li class="delete-user" ng-class="{'active': isChecked}"><i class="fa  fa-trash-o"></i> Delete</li>
    <li>
        <select ng-disabled="!isChecked">
            <option>...</option>
        </select>
    </li>
</ul>

<ul class="list-view user-list" ng-if="users.length">
    <li ng-repeat="user in users | orderBy:'name'" class="list-view__item">
        <input type="checkbox" ng-model="isChecked">
    </li>
</ul>

the ng-model within ng-repeat does not add active class to delete-user. nor does it disable select.

This is a scope issue, but I am having trouble figuring it out.