Azure Pipelines Docker Compose environment binding failure mode 2

azure-pipelines.yml

jobs:
- job: Example
  displayName: Example
  variables:
    build_id: $(Build.BuildId)
  pool:
    vmImage: 'ubuntu-latest'
  steps:
  - bash: echo $BUILD_ID
  - task: DockerCompose@0
    inputs:
      containerregistrytype: 'Container Registry'
      dockerRegistryEndpoint: 'Insert Registry Here'
      dockerComposeFile: '**/docker-compose.yml'
      action: 'Run a specific service'
      serviceName: 'example'
      containerCommand: echo $BUILD_ID
      detached: false

docker-compose.yml

services:
  example:
    build: .
    environment:
      BUILD_ID:

Dockerfile

FROM busybox