ruby - The 'json' native gem requires installed build tools - Stack Overflow
Follow the Instructions from the Ruby Installer Developer Kit Wiki: Download Ruby 1.9.3 from rubyinstaller.org Download DevKit file from rubyinstaller.org For Ruby 1.9.3 use DevKit-tdm-32-4.5.2-20110712-1620-sfx.exe Extract DevKit to path C:\Ruby193...