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<body><blockquote><div dir="ltr">This use-case of rebar is an important one due to Erlang's focus on fault-tolerance. To make sure your built is robust and stable,
it requires having all your dependencies at a known state.<br></div>
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<div>Your build artifact for deployment is a release which does "bundle" all dependencies at a certain point in time.<br></div>
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<div>For reproducibility in the event of losing the original release is, as you mention, what the lock files are for. When hex gains easy mirroring there will also be a quick way to ensure you have your own backups of alls your dependencies.<br></div>
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