Tratando de conseguir una aplicación de Rails clonada en ejecución. Cuando se ejecutabundle install Me sale este error:

Using mini_portile (0.5.0)
Installing nokogiri (1.6.0)
Gem::InstallError: nokogiri requires Ruby version >= 1.9.2.
An error occurred while installing nokogiri (1.6.0), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.6.0'` succeeds before bundling.

Pero esta es la salida pararbenv version:

› rbenv version
1.9.3-p429 (set by /Users/andrewguo/.rbenv/version)

Cuando se ejecutagem list Yo obtengo:

.
.
.
mini_portile (0.5.0)
minitest (2.5.1)
multi_json (1.7.7)
nokogiri (1.6.0)

He estado atormentando mi cerebro durante una hora tratando de averiguar qué puede estar mal ... ¡Por favor, ayuda!

Editar:

Aquí hay una salida de error más detallada:

An error occurred while installing nokogiri (1.6.0), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.6.0'` succeeds before bundling.
Bundler::InstallError: An error occurred while installing nokogiri (1.6.0), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.6.0'` succeeds before bundling.
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/installer.rb:130:in `install_gem_from_spec'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/installer.rb:91:in `run'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/installer.rb:90:in `run'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/installer.rb:14:in `install'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/cli.rb:247:in `install'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/vendor/thor/task.rb:27:in `__send__'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/vendor/thor/task.rb:27:in `run'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/vendor/thor/invocation.rb:120:in `invoke_task'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/vendor/thor.rb:344:in `dispatch'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/vendor/thor/base.rb:434:in `start'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/bin/bundle:20
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/lib/bundler/friendly_errors.rb:3:in `with_friendly_errors'
/Library/Ruby/Gems/1.8/gems/bundler-1.3.5/bin/bundle:20
/usr/bin/bundle:19:in `load'
/usr/bin/bundle:19