Gemfile in nanoc-4.0.0b3 vs Gemfile in nanoc-4.0.0b4

@@ -10,9 +10,10 @@
 gem 'coderay'
 gem 'compass'
 gem 'coffee-script'
 gem 'coveralls', require: false
 gem 'erubis'
+gem 'fakefs'
 gem 'fog'
 gem 'haml'
 gem 'handlebars', platforms: :ruby
 gem 'kramdown'
 gem 'less', '~> 2.0', platforms: :ruby