I'm using the CDK Kinesis Firehose construct as below but it doesn't manage to deploy the stack giving me a "Dynamic Partitioning Namespaces can only be part of a prefix expression when Dynamic Partitioning is enabled." error when trying to create the AWS:KinesisFirehose:DeliveryStream . I tried googling this without success and can't find where in CDK I could enable dynamic partitioning. Any idea anyone ??

import * as firehose from "@aws-cdk/aws-kinesisfirehose-alpha";
import * as firehose_destinations from "@aws-cdk/aws-kinesisfirehose-destinations-alpha";
...
    const auditBucket = new Bucket(this, 'Audit')
    const cdkAuditBucket = auditBucket.cdk.bucket
    const firehoseDestination = new firehose_destinations.S3Bucket(cdkAuditBucket, { dataOutputPrefix: 'site!{partitionKeyFromQuery:id_site}/!{timestamp:yyyy}/!{timestamp:MM}/', errorOutputPrefix: 'firehoseErrors/' })

    const kinesisFirehose = new firehose.DeliveryStream(this, 'Audit Firehose', { destinations: [firehoseDestination] });
    config['AuditKinesisDeliveryStreamName'] = kinesisFirehose.deliveryStreamName