dagrs:
  a:
    name: "Task 1"
    after: [ b, c ]
    cmd: echo x
  b:
    name: "Task 2"
    after: [ c ]
    cmd: echo x
  c:
    name: "Task 3"
    after: [ d ]
    cmd: echo x
  d:
    name: "Task 4"
    after: [ e ]
    cmd: echo x
  e:
    name: "Task 5"
    after: [ c ]
    cmd: echo x