Nanoc 3 error

backtrace

> nanoc deploy --target default

Captain! We’ve been hit!

=== MESSAGE:

LoadError: cannot load such file -- fog

=== COMPILATION STACK:

  (empty)

=== BACKTRACE:

  0. /Users/andrew/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
  1. /Users/andrew/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
  2. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/extra/deployers/fog.rb:24:in `run'
  3. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli/commands/deploy.rb:72:in `run'
  4. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli/command_runner.rb:14:in `block in call'
  5. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli/error_handler.rb:42:in `handle_while'
  6. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli/error_handler.rb:23:in `handle_while'
  7. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli/command_runner.rb:13:in `call'
  8. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/cri-2.1.0/lib/cri/command_dsl.rb:175:in `block in runner'
  9. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/cri-2.1.0/lib/cri/command.rb:255:in `call'
  10. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/cri-2.1.0/lib/cri/command.rb:255:in `run'
  11. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/cri-2.1.0/lib/cri/command.rb:272:in `run'
  12. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli.rb:44:in `block in run'
  13. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli/error_handler.rb:42:in `handle_while'
  14. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli/error_handler.rb:23:in `handle_while'
  15. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/lib/nanoc/cli.rb:41:in `run'
  16. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/gems/nanoc-3.3.0/bin/nanoc:12:in `<top (required)>'
  17. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/bin/nanoc:19:in `load'
  18. /Users/andrew/.rvm/gems/ruby-1.9.3-p0@lovely-planet/bin/nanoc:19:in `<main>'

=== VERSION INFORMATION:

nanoc 3.3.0 © 2007-2012 Denis Defreyne.
Running ruby 1.9.3 (2011-10-30) on x86_64-darwin11.2.0 with RubyGems 1.8.15.

config.yaml

deploy:
  default:
    kind:                  fog
    provider:              aws
    bucket:                lovely-planet
    aws_access_key_id:     <id>
    aws_secret_access_key: <key>