Failing to install Nokogiri gem
This works like a charm!
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2
On Ubuntu, try installing the following dependencies:
sudo apt-get install gcc ruby-dev libxslt-dev libxml2-dev zlib1g-dev
Have you tried gem install nokogiri -v 1.6.5 -- --use-system-libraries?Most nokogiri errors are to do with libxml2, libxslt or libiconv config.
Nokogiri docs should give you more instructions. If the solution doesn't work, you may want to post full stack trace so others can help more.