public_ip = PublicIp(
        f'{env}_public_ip',
        name=f'{PREFIX}-{env}-public-ip',
        resource_group_name=aks_stack.get_output('rg_name'),
        allocation_method='Static',
        domain_name_label=f'{PREFIX}-{env}')

    nginx_chart_opts = ChartOpts(f'{env}-nginx-chart-opts')
    nginx_chart_opts.transformations = [lambda config_file: set_metadata_namespace(config_file, env)]
    nginx_chart_opts.repo = 'stable'
    nginx_chart_opts.chart = 'nginx-ingress'
    nginx_chart_opts.namespace = env
    nginx_chart_opts.values = \
    {
        'controller':
        {
            'service':
            {
                'loadBalancerIP': 'SET BELOW'
            },
            'replicaCount': 2
        },
        'rbac':
        {
            'create': True
        }
    }

    def set_load_balancer_ip(ip_address):
        nginx_chart_opts.values['controller']['service']['loadBalancerIP'] = ip_address

    public_ip.ip_address.apply(lambda ip_address: set_load_balancer_ip(ip_address))

    # Deploy the nginx ingress controller.
    nginx_ingress = Chart(
        f'{env}-nginx-ingress',
        nginx_chart_opts,
        opts=ResourceOptions(provider=custom_provider, depends_on=[public_ip]))

nginx_chart_opts.values = Output.from_input({ .... })