As a workaround for now I went with installing the dependencies via an init script on the cluster.

resources:
  pipelines:
    bronze:
      name: ${var.stage_name}_bronze
      clusters:
        - label: default
          autoscale: ${var.default_dlt_cluster.autoscale}
          spark_conf: ${var.default_dlt_cluster.spark_conf}
          init_scripts: 
            - workspace:
                destination: ${workspace.file_path}/resources/init_scripts/cluster_dependencies.sh
[...]