Nokogiri error when running bundle install

I'm using Mac OSX (El Capitan) and it appears to be related to Xcode Developer Tools. I ran xcode-select --install in my working directory, then reran bundle install command and it all worked fine after that ^^.

Hope this could help someone.

I ran into this error and this is what worked for me:

bundle config build.nokogiri --use-system-libraries
bundle install

The problem was with libxml:

libxml2 is missing.  Please locate mkmf.log to investigate how it is failing.