Support for bundler groups?

[daniel-rikowski]

I'm using groups in my Gemfile because some large gems are only needed during development.

gem 'sinatra'
gem 'sinatra-partial'
gem 'sinatra-contrib', group: :development
gem 'activesupport', require: false

group :development do
  gem 'sass'
  gem 'bourbon'
  gem 'coffee-script'
end

Using the --gemfile option ocra compiles all gems into executable, even the ones I don't need.

Is there a way to tell ocra to ignore gems from a group or to specify which groups I need?