[Python] Locust not supporting `--exit-code-on-error` argument?

Can someone help determining what I am doing wrong with having --exit-code-on-error?

python -m locust.main -f tt/tt_test.py -H http://thuis:8088/public --no-web --clients=3 --hatch-rate=1 --run-time=1m --csv=social_soak --exit-code-on-error=0


Getting below error:

Usage: locust [options] [LocustClass [LocustClass2 ... ]]

main.py: error: no such option: --exit-code-on-error



Clearly, --exit-code-on-error is supported as seen here: https://github.com/locustio/locust/blob/610a87f433900d8baae51709c41e3b147a53bc97/locust/main.py#L286

If I take out this option, then the below command runs:

python -m locust.main -f tt/tt_test.py -H http://thuis:8088/public --no-web --clients=3 --hatch-rate=1 --run-time=1m --csv=social_soak


But I would really like to use the --exit-code-on-error option. Any idea how to do that? Thanks in advance.

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