I can not deploy specified hosting target

[sekitaka]

Affected builder image

gcr.io/cloud-builders-community/firebase

Expected Behavior

I can deploy specified hosting target.

Actual Behavior

I can not deploy specified hosting target.
I got this error.

textPayload: "Step #3 - "deploy to firebase hosting": Error: Deploy target $MY_HOSTING_TARGET not configured for project $MY_FIREBASE_PROJECT_ID. Configure with:"

Steps to Reproduce the Problem

1. Deploy with this cloudbuild.yml

  - name: gcr.io/MY_GCP_PROJECT/firebase
    id: 'deploy to firebase hosting'
    args: [ 'deploy', '--project=MY_FIREBASE_PROJECT_ID', '--only=hosting:MY_HOSTING_TARGET' ]
    dir: admin-tool

firebase.json like this

{
  "hosting": {
    "target": "MY_HOSTING_TARGET",
    "public": "build",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**"
    ],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  }
}

Additional Info