[
  {
    "cmd": [
      "vpython",
      "-u",
      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
      "--json-output",
      "/path/to/tmp/json",
      "copy",
      "None/tools/build.py",
      "/path/to/tmp/"
    ],
    "infra_step": true,
    "name": "detect python version",
    "~followup_annotations": [
      "@@@STEP_LOG_END@build.py@@@"
    ]
  },
  {
    "cmd": [
      "python"
    ],
    "name": "python"
  },
  {
    "name": "$result"
  }
]