如何在头盔图表中的嵌套地图上循环?

我希望能够传入env vars纯文本和以下秘密:

envVars:
  var1: 'sdfsdfsdf'
  var2: 'efwefwefwef'

envVarsSecret:
  var3:
      secretKeyRef: my-secret
      key: key

env:
# This works
{{- range $key, $value := .Values.envVars }}
- name: {{ $key }}
  value: {{ $value | quote }}
{{- end }}

# This doesn't throw an error but when deployed secretKeyRef and key are blank (the secret was pre-created and exists)
{{- range $key, $value := .Values.envVarsSecret }}
- name: {{ $key }}
  valueFrom:
    secretKeyRef:
      name: {{ $.Values.envVarsSecret.secretKeyRef | quote }}
      key: {{ $.Values.envVarsSecret.key | quote }}
{{- end }