nokogiriがinstallできないときー

nokogiriがinstallできねぇ

An error occurred while installing nokogiri (1.8.2), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.8.2' --source 'http://rubygems.org/'` succeeds before bundling.

In Gemfile:
  capybara was resolved to 3.2.1, which depends on
    xpath was resolved to 3.1.0, which depends on
      nokogiri
[jenkins@ip-172-31-36-13 cucumber]$ bundle exec cucumber
Could not find gem 'nokogiri (~> 1.8.2)' in any of the gem sources listed in your Gemfile.
Run `bundle install` to install missing gems.

必要なpackageを追加する

$ sudo yum install libxml2-devel libxslt-devel

bundle installする

$ bundle install
Fetching nokogiri 1.8.2
Installing nokogiri 1.8.2 with native extensions
Your bundle is complete!