(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:disk)
          op: Equal
          rhs: {(DQ (kube-master-disk.img))}
          spids: [3]
        )
      ]
      spids: [3]
    )
    (C {(set)} {(-x)})
    (C {(rm)} {(-f)} {(DQ (${ VSub_Name disk))})
    (C {(../../bin/moby)} {(run)} {(hyperkit)} {(-cpus)} {(2)} {(-mem)} {(4096)} {(-disk-size)} {(4096)} 
      {(kube-master)}
    )
  ]
)