Serverless on gcp add custom http path

I have this serverless function that I deploy on Google Cloud Functions but I want it to sit at a custom http path instead of the function handler name.

functions:
  board_meta:
    memorySize: 128
    handler: boardMeta
    events:
      - http: board-meta

The desired path is board-meta but this simply ignores the - http: board-meta direction. And it deploys the function with boardMeta as a path.

I also tried with:

functions:
  board_meta:
    memorySize: 128
    handler: boardMeta
    events:
      - http: 
        path: board-meta

This results with an error:

Deployment failed: CONDITION_NOT_MET

     "/httpsTrigger/url": domain: validation; keyword: type; message: instance does not match any allowed primitive type; allowed: ["string"]; found: "null"