Using sls deploy --package doesn't work with serverless for google cloud functions

I was following the quick start guide for serverless Serverless Framework - Google Cloud Functions Guide - Quick Start and created a service as mentioned in the guide. I ran the following commands:

serverless create --template google-nodejs --path my-service
cd my-service
npm install

I edited the serverless.yml to contain a valid key path and tried the following command

serverless package

A .serverless folder was created with file in it. Later I tried to deploy this file using

serverless deploy --package <absolute path of file>

The command failed with the following error

I am wondering if I missed something or serverless doesn’t support deploy --package option for google cloud functions.

My serverless version is 1.44.1

My actual use case is to deploy a prepackaged zipped file to google cloud functions using serverless