Kitchen at TOT breaks fuchsia builds like this:
https://luci-scheduler.appspot.com/jobs/fuchsia/linux-arm64-debug/9152337173605228240

Stack:
Traceback (most recent call last):
  File "/b/swarm_slave/w/ir8Ux6DU/recipes/checkout/.recipe_deps/recipe_engine/recipes.py", line 703, in <module>
    ret = main()
  File "/b/swarm_slave/w/ir8Ux6DU/recipes/checkout/.recipe_deps/recipe_engine/recipes.py", line 621, in main
    return _real_main(args, op_args)
  File "/b/swarm_slave/w/ir8Ux6DU/recipes/checkout/.recipe_deps/recipe_engine/recipes.py", line 669, in _real_main
    return run(package_deps, args, op_args)
  File "/b/swarm_slave/w/ir8Ux6DU/recipes/checkout/.recipe_deps/recipe_engine/recipes.py", line 244, in run
    with stream_engine.new_step_stream('Initial Properties') as s:
  File "/b/swarm_slave/w/ir8Ux6DU/recipes/checkout/.recipe_deps/recipe_engine/recipe_engine/stream.py", line 162, in new_step_stream
    self._engine_a.new_step_stream(step_config),
  File "/b/swarm_slave/w/ir8Ux6DU/recipes/checkout/.recipe_deps/recipe_engine/recipe_engine/stream.py", line 356, in new_step_stream
    assert step_config.name not in self._streams, (
AttributeError: 'str' object has no attribute 'name'
Uncaught exception (AttributeError): 'str' object has no attribute 'name'