How to preserve spaces in multiline string for helm value with cdktf

I'm using CDKTF to deploy the datadog helm chart into a kubernetes cluster. I'm trying to set a value for confd but the spaces in my typescript multiline string aren't being preserved. Here's how I'm setting the confd value in typescript

    new helm.Release(this, "datadog-agent", {
      chart: "datadog",
      name: "datadog",
      repository: "https://helm.datadoghq.com",
      version: "3.1.3",
      set: [
        {
          name: "clusterAgent.confd",
          value: `postgres.yaml: |-
cluster_check: true
init_config:
instances:
\t- dbm: true
\t  host: <redacted>
\t  port: 5432
\t  username: datadog
\t  password: <redacted>
    `
        }

      ],
    });

however, when I try to deploy this I see the following diff

                   + set {
                   + name  = "clusterAgent.confd"
                   + value = <<-EOT
                   postgres.yaml: |-
                   cluster_check: true
                   init_config:
                   instances:
                   - dbm: true
                   host: <redacted>
                   port: 5432
                   username: datadog
                   password: <redacted>

                   EOT

which makes it seem like all the spaces and tabs in the multiline string are being stripped.

How can I get CDKTF to preserve the spaces in my multiline string?