(command.CommandList
  children: [
    (command.Simple blame_tok:<set> more_env:[] words:[{<set>} {<-e>}] redirects:[] do_fork:T)
    (command.Simple
      blame_tok: <exec>
      more_env: []
      words: [
        {<exec>}
        {
          (DQ 
            (CommandSub
              left_token: <Id.Left_DollarParen '$('>
              child: 
                (command.Simple
                  blame_tok: <dirname>
                  more_env: []
                  words: [{<dirname>} {(DQ (${ Id.VSub_Number 0))}]
                  redirects: []
                  do_fork: T
                )
              right: <Id.Eof_RParen _>
            ) <'/change_mach_o_flags.py'>
          )
        }
        {(DQ (${ Id.VSub_At '@'))}
        {(DQ (${ Id.VSub_Name BUILT_PRODUCTS_DIR) <'/'> (${ Id.VSub_Name EXECUTABLE_PATH))}
      ]
      redirects: []
      do_fork: T
    )
  ]
)