agent:
  build: .
  volumes:
    - ./:/go/src/github.com/buildkite/agent
  environment:
    - BUILDBOX_AGENT_ACCESS_TOKEN
    - BUILDKITE_BUILD_NUMBER

agent:
  build: .
  volumes:
    - ./:/go/src/github.com/buildkite/agent
  environment:
    - BUILDBOX_AGENT_ACCESS_TOKEN
    - BUILDBOX_JOB_ID
    - BUILDKITE_BUILD_NUMBER

Send the BUILDBOX_JOB_ID through to the dockerfile.
Send the BUILDBOX_JOB_ID through to the dockerfile.
