(command.CommandList
  children: [
    (C {<.>} {(${ Id.VSub_Name srcdir) <'/emulparams/elf_x86_64.sh'>})
    (C {<.>} {(${ Id.VSub_Name srcdir) <'/emulparams/elf_nacl.sh'>})
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:OUTPUT_FORMAT)
          op: assign_op.Equal
          rhs: {(DQ <elf64-x86-64-nacl>)}
          spids: [14]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:ARCH)
          op: assign_op.Equal
          rhs: {(DQ <'i386:x86-64:nacl'>)}
          spids: [19]
        )
      ]
    )
  ]
)