#22487 Support for selecting a `buildx` driver Issue created by gdfast Is your feature request related to a problem? Please describe. When using

buildx

to build a docker image, you may have multiple buildx drivers configured on your system where you want to choose one for pants to use. Describe the solution you'd like I'd like • a global configuration for the docker subsystem (overridable in a docker_image configuration) that allows for selecting the buildx driver by name • this is used to set the

--builder

argument used in the

docker buildx build

command that pants launches (see https://docs.docker.com/reference/cli/docker/buildx/#builder) Describe alternatives you've considered The only alternatives I am aware of include 1. Setting the buildx driver outside of pants configuration by setting the default with https://docs.docker.com/reference/cli/docker/buildx/use/ 2. Setting

BUILDX_BUILDER=<your driver of choice>

environment variable as a

[docker.env_vars]

Additional context • This builds on the work started in #15199 • See more context in this thread: https://pantsbuild.slack.com/archives/C046T6T9U/p1751926012583459 pantsbuild/pants