Error while adding local path in Gemfile

[emilianodellacasa]

Describe the bug

I added to my Gemfile a local gem using the standard format

gem 'test_gem', path: 'vendor/gems/test_gem'

However, when deploy it gives me the following error

Error Stack Trace

Error:
Error: The path
/<my-path>/.serverless/ruby_layer/vendor/gems/test_gem
does not exist.

Example Config files
This is my Gemfile:

source "https://rubygems.org"

gem 'rails'
gem 'json'
gem 'test_gem', path: 'vendor/gems/test_gem'

Desktop (please complete the following information):

• OS: Ubuntu 20.04
• NodeVersion 14.17.0
• Ruby version 2.7.5
• Bundler version 2.2.5