There are builds in our projects that are typically flaky. Additionally there might be cases where the external environment changed and we want to re-run the step again. Is it possible for that? For now we have to kick off the entire build again but it would be great to just re-run the single (passed) step.
Hi @simon-mo ! Welcome back! 
Sure! you can. Passed steps can be retried if permitted: https://buildkite.com/docs/pipelines/command-step#manual-retry-attributes
We don’t assume steps that pass are retryable, because that would break many workflows.
Cheers!