title: Gem::installerror: the 'json' native gem requires installed build tools. Please update our PATH to include build tools
body: <p>I used Railsinstaller to install rails, but I still get this error message. Based on what other questions regarding this, it seems that Railsinstaller should include devkit and this problem shouldn't happen.</p>
  
  <p>What did I do wrong?</p>
  
  <p>By the way, this was when I changed the gemfile to include 'pg' under production (and of course, put sqlite under development and test) and then trying to run bundle install --without production.</p>
  
  <p>Thanks in advance for your help!</p>