problem installing evernicious

[workproduct]

gem install evernicious Building native extensions. This could take a while... ERROR: Error installing evernicious: ERROR: Failed to build gem native extension.

current directory: /var/lib/gems/2.3.0/gems/nokogiri-1.4.7/ext/nokogiri

/usr/bin/ruby2.3 -r ./siteconf20171221-2322-1q8doho.rb extconf.rb *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.

Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/bin/$(RUBY_BASE_NAME)2.3 extconf.rb:10:in `

': uninitialized constant Config (NameError) Did you mean? RbConfig CONFIG

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/nokogiri-1.4.7 for inspection. Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/nokogiri-1.4.7/gem_make.out