Ошибка RubyGems после обновления системы

При попытке запустить консоль rails после обновления моей установки ruby с помощью 'sudo gem update --system', я затем пытаюсь выполнить консоль rails, выдавая rails c

Я получаю эту ошибку:

Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:247:in `to_specs': Could not find json (~> 1.4) amongst [Ascii85-1.0.1, abstract-1.0.0, actionmailer-3.1.1, actionmailer-3.1.0, actionmailer-3.0.9, actionmailer-3.0.5, actionmailer-3.0.3, actionpack-3.1.1, actionpack-3.1.0, actionpack-3.0.9, actionpack-3.0.5, actionpack-3.0.3, activemodel-3.1.1, activemodel-3.1.0, activemodel-3.0.10, activemodel-3.0.9, activemodel-3.0.5, activemodel-3.0.3, activerecord-3.1.1, activerecord-3.1.0, activerecord-3.0.9, activerecord-3.0.5, activerecord-3.0.3, activeresource-3.1.1, activeresource-3.1.0, activeresource-3.0.9, activeresource-3.0.5, activeresource-3.0.3, activesupport-3.1.1, activesupport-3.1.0, activesupport-3.0.10, activesupport-3.0.9, activesupport-3.0.5, activesupport-3.0.3, addressable-2.2.6, ansi-1.3.0, arel-2.2.1, arel-2.0.10, arel-2.0.9, arel-2.0.7, bcrypt-ruby-3.0.1, bcrypt-ruby-3.0.0, bcrypt-ruby-2.1.4, builder-3.0.0, builder-2.1.2, bundler-1.0.21, bundler-1.0.18, bundler-1.0.11, choices-0.2.4, cocaine-0.2.0, coffee-rails-3.1.1, coffee-rails-3.1.0, coffee-script-2.2.0, coffee-script-source-1.1.2, devise-1.4.8, devise-1.4.2, erubis-2.7.0, erubis-2.6.6, execjs-1.2.9, execjs-1.2.6, execjs-1.2.4, faraday-0.7.4, faraday-0.6.1, faraday_middleware-0.7.0, faraday_middleware-0.6.3, fastercsv-1.5.4, formtastic-2.0.2, formtastic-1.2.4, geocoder-1.0.4, geocoder-1.0.2, has_scope-0.5.1, hashie-1.1.0, hashie-1.0.0, heroku-2.7.0, hike-1.2.1, i18n-0.6.0, i18n-0.5.0, inherited_resources-1.3.0, inherited_resources-1.2.2, jquery-rails-1.0.16, jquery-rails-1.0.14, kaminari-0.12.4, launchy-2.0.5, libv8-3.3.10.2-x86_64-darwin-10, mail-2.3.0, mail-2.2.19, mail-2.2.15, mail-2.2.14, mechanize-2.0.1, mechanize-1.0.0, meta_search-1.1.1, meta_search-1.0.6, mime-types-1.16, multi_json-1.0.3, multi_xml-0.4.1, multi_xml-0.4.0, multi_xml-0.3.0, multi_xml-0.2.2, multipart-post-1.1.3, multipart-post-1.1.2, mysql-2.8.1, mysql2-0.3.7, mysql2-0.2.7, mysql2-0.2.6, net-http-digest_auth-1.1.1, net-http-persistent-2.1, net-http-persistent-2.0, net-http-persistent-1.9, nokogiri-1.5.0, nokogiri-1.4.4, orm_adapter-0.0.5, pdf-reader-0.10.0, pg-0.11.0, polyamorous-0.5.0, polyglot-0.3.2, polyglot-0.3.1, prawn-0.12.0, rack-1.3.4, rack-1.3.3, rack-1.3.2, rack-1.2.3, rack-1.2.2, rack-1.2.1, rack-cache-1.1, rack-cache-1.0.3, rack-mount-0.8.3, rack-mount-0.6.14, rack-mount-0.6.13, rack-ssl-1.3.2, rack-test-0.6.1, rack-test-0.5.7, rails-3.1.1, rails-3.1.0, rails-3.0.9, rails-3.0.5, rails-3.0.3, railties-3.1.1, railties-3.1.0, railties-3.0.9, railties-3.0.5, railties-3.0.3, rake-0.9.2, rake-0.8.7, rake-0.8.7, rash-0.3.1, rash-0.3.0, rdoc-3.10, rdoc-3.9.4, rdoc-3.9.2, responders-0.6.4, rest-client-1.6.7, rubygems-update-1.8.11, rubygems-update-1.8.10, rubygems-update-1.7.2, rubygems-update-1.7.1, rubygems-update-1.6.2, rubyzip-0.9.4, sass-3.1.10, sass-3.1.7, sass-rails-3.1.4, sass-rails-3.1.2, sass-rails-3.1.0, simple_oauth-0.1.5, sprockets-2.0.2, sprockets-2.0.0, sqlite3-1.3.4, term-ansicolor-1.0.6, therubyracer-0.9.4, thor-0.14.6, tilt-1.3.3, treetop-1.4.10, treetop-1.4.9, ttfunk-1.0.3, ttfunk-1.0.2, turn-0.8.2, twitter-1.7.1, twitter-1.4.1, tzinfo-0.3.30, tzinfo-0.3.29, tzinfo-0.3.26, tzinfo-0.3.24, uglifier-1.0.3, warden-1.0.6, warden-1.0.5, webrobots-0.0.12, webrobots-0.0.11] (Gem::LoadError)
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1932:in `block in traverse'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1931:in `each'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1931:in `traverse'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:465:in `block in find_in_unresolved_tree'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:463:in `reverse_each'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:463:in `find_in_unresolved_tree'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:47:in `require'
from /Users/myusername/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.1.1/lib/rails/script_rails_loader.rb:1:in `<top (required)>'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in `require'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in `require'
from /Users/myusername/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.1.1/lib/rails/cli.rb:2:in `<top (required)>'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in `require'
from /Users/myusername/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in `require'
from /Users/myusername/.rvm/gems/ruby-1.9.2-p136/gems/rails-3.1.1/bin/rails:7:in `<top (required)>'
from /Users/myusername/.rvm/gems/ruby-1.9.2-p136/bin/rails:19:in `load'
from /Users/myusername/.rvm/gems/ruby-1.9.2-p136/bin/rails:19:in `<main>'

Есть идеи?