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<@U045FPK11FU> Docker supports cross platform builds:

<https://github.com/jaxxstorm/pulumi-examples/blob/da1ac451464fe5976fbcfa3cd2c1834efde917ff/python/aws/fargate_postgres_webapp/deploy/__main__.py#L27>

I'm aware, but that requires emulation support by the builder

Which is controlled by Pulumi Deployments

In our case we set the platform with the `--platform` flag, and Pulumi errored out

Saying that the builder didn't support ARM64

<@U045FPK11FU> we are discussing this internally

<@U045FPK11FU> please add
```docker run --privileged --rm tonistiigi/binfmt --install all```
To your prerun commands, then you can set the platform on the docker build context and it should just work

Thanks <@UCWG26BH7>. I'll give that a try

<@U01BSQWRZFA> you mentioned you'd create an issue to support ARM64 natively for Pulumi runners. Do you have the link to that issue? I'd like to leave a comment right by where I set the above pre-run command to explain why it's there, and why we'll hopefully remove it in the future

image.png

<@UCWG26BH7> I guess I need to install `docker` into the custom image? I'm a bit surprised we were able to build images with `pulumi-docker` at all without it having been installed

n.b. we use a custom image so that we can use Python 3.11, instead of the default which is Python 3.9: <https://github.com/pulumi/pulumi-docker-containers/issues/144>

<@U045FPK11FU> Here’s the issue. <https://github.com/pulumi/pulumi-cloud-requests/issues/305>

I suppose `pulumi-service` is a private repository

Yeah - I put it in the wrong place - one sec

After installing `docker` into our custom image it seems to be working, albeit slowly

<https://pulumi-community.slack.com/archives/C048NVDH6DV/p1695410144438749?thread_ts=1695404132.821389&amp;cid=C048NVDH6DV|Yup>

We'd rather not, but adding support for Python 3.9 for all our infra code would be much more work than just maintaining this custom image and putting up with the longer deployment/preview times

Sorry for presumably leaving you confused over why `docker` wasn't installed