[yast-commit] Build failed in Jenkins: yast-yast.github.io-master #4

http://ci.opensuse.org/job/yast-yast.github.io-master/4/------------------------------------------
Started by user YaST Team
[EnvInject] - Loading node environment variables.
Building remotely on yast-jenkins in workspace <http://ci.opensuse.org/job/yast-yast.github.io-master/ws/>
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url https://github.com/yast/yast.github.io.git # timeout=10
Fetching upstream changes from https://github.com/yast/yast.github.io.git
 > git --version # timeout=10
 > git fetch --tags --progress https://github.com/yast/yast.github.io.git +refs/heads/*:refs/remotes/origin/*
 > git rev-parse origin/master^{commit} # timeout=10
Checking out Revision cd3d00645894948c464f084b826e43eb6f5397d3 (origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f cd3d00645894948c464f084b826e43eb6f5397d3
 > git rev-list cd3d00645894948c464f084b826e43eb6f5397d3 # timeout=10
Cleaning workspace
 > git rev-parse --verify HEAD # timeout=10
Resetting working tree
 > git reset --hard # timeout=10
 > git clean -fdx # timeout=10
[yast-yast.github.io-master] $ /bin/sh -xe /tmp/hudson3954003874079361801.sh
+ gem install --no-format-exec --user-install bundler
WARNING:  You don't have /home/jenkins/.gem/ruby/2.1.0/bin in your PATH,
	  gem executables will not run.
Bundler and RubyGems.org are free for anyone to use, but maintaining them costs more than $25,000 USD every month. Help us cover those costs so that we can keep the gem ecosystem free for everyone: https://ruby.to/support-bundler
Successfully installed bundler-1.14.3
Parsing documentation for bundler-1.14.3
Done installing documentation for bundler after 7 seconds
1 gem installed
+ export PATH=/home/jenkins/bin:/usr/local/bin:/usr/bin:/bin:/usr/games:/home/jenkins/.gem/ruby/2.1.0/bin
+ PATH=/home/jenkins/bin:/usr/local/bin:/usr/bin:/bin:/usr/games:/home/jenkins/.gem/ruby/2.1.0/bin
+ NOKOGIRI_USE_SYSTEM_LIBRARIES=1
+ bundle install --path .vendor/bundle
Fetching gem metadata from https://rubygems.org/............
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies...
Installing rake 12.0.0
Installing i18n 0.7.0
Installing json 1.8.6 with native extensions
Installing minitest 5.10.1
Installing thread_safe 0.3.5
Installing public_suffix 2.0.5
Installing coffee-script-source 1.12.2
Installing execjs 2.7.0
Installing colorator 1.1.0
Installing ffi 1.9.17 with native extensions
Installing multipart-post 2.0.0
Installing forwardable-extended 2.6.0
Installing gemoji 2.1.0
Installing net-dns 0.8.0
Installing sass 3.4.23
Installing rb-fsevent 0.9.8
Installing kramdown 1.11.1
Installing liquid 3.0.6
Installing mercenary 0.3.6
Installing rouge 1.11.1
Installing safe_yaml 1.0.4
Installing mini_portile2 2.1.0
Installing jekyll-paginate 1.1.0
Installing jekyll-swiss 0.4.0
Installing minima 2.0.0
Installing unicode-display_width 1.1.3
Installing rainbow 2.2.1 with native extensions
Installing raspell 1.3 with native extensions
Using bundler 1.14.3
Installing packaging_rake_tasks 1.2.1
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /usr/bin/ruby.ruby2.1 extconf.rb 
mkmf.rb can't find header files for ruby at /usr/lib64/ruby/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in
<http://ci.opensuse.org/job/yast-yast.github.io-master/ws/.vendor/bundle/ruby/2.1.0/gems/json-1.8.6>
for inspection.
Results logged to
<http://ci.opensuse.org/job/yast-yast.github.io-master/ws/.vendor/bundle/ruby/2.1.0/extensions/x86_64-linux/2.1.0/json-1.8.6/gem_make.out>

An error occurred while installing json (1.8.6), and Bundler cannot continue.
Make sure that `gem install json -v '1.8.6'` succeeds before bundling.
Build step 'Execute shell' marked build as failure
Skipped archiving because build is not successful