error output

mark@T410s-a:~/01rails/virtual-museum$ cucumber
WARN: Unresolved specs during Gem::Specification.reset:
      tzinfo (~> 0.3.37)
      minitest (~> 4.2)
      arel (~> 4.0.0)
      polyglot (>= 0.3.1)
      rake (>= 0.8.7)
      sprockets (~> 2.8)
      atomic (< 2, >= 1.1.7)
WARN: Clearing out unresolved specs.
Please report a bug if this causes problems.
You have already activated i18n 0.6.9, but your Gemfile requires i18n 0.6.5. Prepending `bundle exec` to your command may solve this. (Gem::LoadError)
/home/mark/.gem/ruby/2.0.0/gems/bundler-1.5.3/lib/bundler/runtime.rb:34:in `block in setup'
/home/mark/.gem/ruby/2.0.0/gems/bundler-1.5.3/lib/bundler/runtime.rb:19:in `setup'
/home/mark/.gem/ruby/2.0.0/gems/bundler-1.5.3/lib/bundler.rb:119:in `setup'
/home/mark/.gem/ruby/2.0.0/gems/bundler-1.5.3/lib/bundler/setup.rb:7:in `<top (required)>'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:66:in `require'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:66:in `require'
/home/mark/01rails/virtual-museum/config/boot.rb:4:in `<top (required)>'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:114:in `require'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:114:in `require'
/home/mark/01rails/virtual-museum/config/application.rb:1:in `<top (required)>'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:114:in `require'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:114:in `require'
/home/mark/01rails/virtual-museum/config/environment.rb:2:in `<top (required)>'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:114:in `require'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:114:in `require'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-rails-1.4.0/lib/cucumber/rails.rb:7:in `<top (required)>'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:118:in `require'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:118:in `rescue in require'
/opt/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:124:in `require'
/home/mark/01rails/virtual-museum/features/support/env.rb:7:in `<top (required)>'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/rb_support/rb_language.rb:122:in `load'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/rb_support/rb_language.rb:122:in `load_code_file'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/runtime/support_code.rb:180:in `load_file'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/runtime/support_code.rb:83:in `block in load_files!'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/runtime/support_code.rb:82:in `each'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/runtime/support_code.rb:82:in `load_files!'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/runtime.rb:184:in `load_step_definitions'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/runtime.rb:42:in `run!'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/lib/cucumber/cli/main.rb:47:in `execute!'
/home/mark/.gem/ruby/2.0.0/gems/cucumber-1.3.10/bin/cucumber:13:in `<top (required)>'
/home/mark/.gem/ruby/2.0.0/bin/cucumber:23:in `load'
/home/mark/.gem/ruby/2.0.0/bin/cucumber:23:in `<main>'
mark@T410s-a:~/01rails/virtual-museum$