Heroku Issue

[eltiare]

I just upgraded Locomotive and now I'm getting a weird error message on Heroku:

-----> Installing dependencies using 
       Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin --deployment
       env: bundle: No such file or directory
       Bundler Output: env: bundle: No such file or directory

I can't for the life of me figure out what this means. Here's my gem file:

source 'https://rubygems.org'

gem 'rails', '~> 3.2'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'rails_12factor'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'
  gem 'turbo-sprockets-rails3'
  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', :platform => :ruby
  gem 'compass-rails', '~> 1.0.0'
  gem 'uglifier', '>= 1.0.3'
end


# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

gem 'locomotive_cms', '~> 2.0.0', :require => 'locomotive/engine'
gem 'unicorn', :group => 'development'

gem 'locomotive-heroku', :require => 'locomotive/heroku'
gem 'thin', :group => 'production'