how to set env for deps

[hellojukay]

version: '3'

vars:
  GREETING: Hello, World!

tasks:
  default:
    cmds:
      - echo $APP_NAME
    silent: true

  template:
    cmds:
      - echo $APP_NAME
    silent: false

  haina:
    env:
      APP_NAME: "haina"
    cmds:
      - echo $APP_NAME
    deps:
      - task: template
        env:
          APP_NAME: haina

env APP_NAME for deps not work.