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Hey all, I feel like im missing something really simple
```@task(result=LocalResult(location="initial_data.prefect"))
def root_task():
    return [1, 2, 3]


@task(result=LocalResult(location="{date:%A}/{task_name}.prefect"))
def downstream_task(x):
    return [i * 10 for i in x]


def rating_model_backtest_workflow(opts: dict):
    with Flow("local-results") as flow:
        downstream_task(root_task)

    flow.run()```
I’m running this from the docs, I am expecting files to show up at `./initial_data.prefect` and the other location, but nothing appears, am I missing something obvious?

OH i think i got it with 2 changes:
• export PREFECT__FLOWS__CHECKPOINTING=true
• file is at `~/prefect/results/./test_root.prefect` which was rather surprising

Glad you got this figured out. If you get a chance, could you move the log to the thread just to clear a bit more space in the main channel?

logs:
```[2021-08-26 10:33:36-0500] INFO - prefect.FlowRunner | Beginning Flow run for 'local-results'
[2021-08-26 10:33:36-0500] INFO - prefect.TaskRunner | Task 'root_task': Starting task run...
[2021-08-26 10:33:36-0500] INFO - prefect.TaskRunner | Task 'root_task': Finished task run for task with final state: 'Success'
[2021-08-26 10:33:36-0500] INFO - prefect.TaskRunner | Task 'downstream_task': Starting task run...
[2021-08-26 10:33:36-0500] INFO - prefect.TaskRunner | Task 'downstream_task': Finished task run for task with final state: 'Success'
[2021-08-26 10:33:36-0500] INFO - prefect.FlowRunner | Flow run SUCCESS: all reference tasks succeeded```


is there a way to set this configuration directly in the workflow code without relying on environment var setup?

If you end up running with Prefect Cloud or Prefect Server, the checkpointing env var will always be true. You can also explicitly state it on the task level `@task(checkpointing=True)`