The buildkit_config setting does not exist in the plugin-docker-buildx build
we run: the binary has no PLUGIN_BUILDKIT_CONFIG, so the block was dead YAML
and `docker buildx create` ran without --config, leaving the spawned buildkit
container with no internal CA. The plugin only writes a buildkit.toml
(pointing at /etc/docker/certs.d/<registry>/ca.crt) when `registry` is set.
Set registry on the build step, drop the dead block from every step, and
fail ci/check-distros.sh when a matrix value restating a distro.env key
drifts from it.
unkin-agent
83beaff2db