Using rails-composer, getting error based on builder version

Question

I'm trying to use rails-composer to start a project. Right after composer installs the gems I get an error and the script stops. Here is the error:

Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
    composer  Running 'after bundler' callbacks.
The template [https://raw.github.com/RailsApps/rails-composer/master/composer.rb] could not be loaded. Error: You have already activated builder 3.0.0, but your Gemfile requires builder 3.0.2. Using bundle exec may solve this.

I'm not sure how to use bundle exec to solve this.

Answer 1

Do this in your commandline

 gem install builder --version '3.0.2'

& then try to use rails-composer