Why does `kamal build` take a deploy lock?

[djmb]

Discussed in https://github.com/basecamp/kamal/discussions/446

^{Originally posted by clintmiller September 6, 2023} Is there a specific reason that calling kamal build takes the deploy lock? It seems like it should be generally safe for builds to run concurrently, regardless of the environment in which they are executed.

Surely I'm just overlooking something simple?

[dhh]

Should definitely be fine to run builds concurrently and therefore no need for a lock.

[djmb]

Fixed by #755