Error to install Nokogiri on OSX 10.9 Maverick?

After navigating the animated GIFs here, all that I had to do was simply xcode-select --install and the gem install nokogiri worked fine.

You can also install Nokogiri on Mac OS X 10.9 Mavericks with full XCode Install using:

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2

Update

For those using Yosemite the following command will work:

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/libxml2 --use-system-libraries

or, it might actually be in your MacOSX10.11.sdk folder (mine was as of 18-Sep-2015) anyways, so even if you are not yet fully up to El Capitan, I had recently updated XCode and you may need to use the El Capitan SDK path, which follows next:

Update

For those using El Capitan the following command will work:

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --use-system-libraries

Update

For those using Sierra the following command will work:

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2 --use-system-libraries