% jekyll build
Configuration file: /home/christophe/personal-blog/_config.yml
/usr/lib/ruby/2.0.0/rubygems/dependency.rb:296:in `to_specs': Could not find 'addressable' (~> 2.3.5) among 38 total gem(s) (Gem::LoadError)
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1209:in `block in activate_dependencies'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1198:in `each'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1198:in `activate_dependencies'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1180:in `activate'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1212:in `block in activate_dependencies'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1198:in `each'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1198:in `activate_dependencies'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1180:in `activate'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1212:in `block in activate_dependencies'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1198:in `each'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1198:in `activate_dependencies'
	from /usr/lib/ruby/2.0.0/rubygems/specification.rb:1180:in `activate'
	from /usr/lib/ruby/2.0.0/rubygems.rb:186:in `rescue in try_activate'
	from /usr/lib/ruby/2.0.0/rubygems.rb:183:in `try_activate'
	from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:117:in `rescue in require'
	from /usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:124:in `require'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/plugin_manager.rb:30:in `block in require_gems'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/plugin_manager.rb:27:in `each'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/plugin_manager.rb:27:in `require_gems'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/plugin_manager.rb:19:in `conscientious_require'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/site.rb:97:in `setup'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/site.rb:49:in `initialize'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/commands/build.rb:30:in `new'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/commands/build.rb:30:in `process'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/lib/jekyll/commands/build.rb:18:in `block (2 levels) in init_with_program'
	from /var/lib/gems/2.0.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `call'
	from /var/lib/gems/2.0.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `block in execute'
	from /var/lib/gems/2.0.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `each'
	from /var/lib/gems/2.0.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `execute'
	from /var/lib/gems/2.0.0/gems/mercenary-0.3.5/lib/mercenary/program.rb:42:in `go'
	from /var/lib/gems/2.0.0/gems/mercenary-0.3.5/lib/mercenary.rb:19:in `program'
	from /var/lib/gems/2.0.0/gems/jekyll-3.0.1/bin/jekyll:17:in `<top (required)>'
	from /usr/local/bin/jekyll:23:in `load'
	from /usr/local/bin/jekyll:23:in `<main>'