I\'m having troubles installing Nokogiri (1.6.8.1) on Mac OS Sierra 10.12.
I tried using brew install libxml2 libxslt and then referencing the install direc
brew install libxml2 libxslt
For Middleman
gem install nokogiri -v '1.8.2' -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/