With

docker buildx build

, by default it doesn't save the build output locally. It can do with the build option

--output type=image

(or shorthand as

--load

). Currently, this output doesn't support multiplatform images, though it looks like it does with the containerd image store, which is currently in beta. As it is, this is a problem with the

pants publish

goal for docker images, as it expects that the image exists locally after running

package

. I'm thinking the best way forward here is to add support for the output option and default it to

type=image

, when using buildx. Related, I'm wondering if there should be an explicit config option in pants to enable buildx - currently it may or may not be used depending on the docker version and the setting of env var

DOCKER_BUILDKIT

.