version: '3'

vars:
  SLEEP: ''

tasks:
  default:
    deps:
      - task: dep1
        vars: { SLEEP: '{{.SLEEP}}' }
      - task: dep2
        vars: { SLEEP: '{{.SLEEP}}' }
      - task: dep3
        vars: { SLEEP: '{{.SLEEP}}' }
      - dep4

  dep1: '{{.SLEEP}}echo ''dep1'''
  dep2: '{{.SLEEP}}echo ''dep2'''
  dep3: '{{.SLEEP}}echo ''dep3'''
  dep4: exit 1