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Is it possible to build docker images across architectures? We are using `docker buildx` to build both x86 and arm containers and wondering if we can get this working with pants.

<@U01PZK60W2F> thoughts? maybe a feature to add?

do you have any native dependencies without wheels built for them? if so, this relates to <https://github.com/pantsbuild/pants/issues/13185>

That would be great to support. I have no personal experience with building images for multiple archs, so would need a little input to get going there..

I guess that it comes down to a) having docker setup properly, and b) creating the correct `docker` incantations to build.

Currently, we rely entirely on an existing docker setup, so that leaves what would be required for step b.

Does that seem to cover it? Can we do more?

<@U06A03HV1> we probably do and I we can work through that over time

yea. i think having the docker support for cross-building of images themselves is step one… after that, `pants` support cross builds of the inputs