Unable to exclude helm chart

I would like to exclude nfs helm chart for cloud deployments. As per the documentation. I tried specifying kots.io/exclude annotation. It doesn’t seem to be working.

apiVersion: kots.io/v1beta1
kind: HelmChart
metadata:
  annotations:
    kots.io/exclude: '{{repl not IsKurl}}'
  name: nfs-server-provisioner
  namespace: '{{repl Namespace}}'
spec:
  chart:
    name: nfs-server-provisioner
    chartVersion: 1.1.3
  values:
    persistence:
      enabled: true
      size: 100Gi

What Is the issue here?
Doesn’t helm chart exclude doesn’t work with repl templates?