Rails Installation error :The 'atomic' native gem requires installed build tools

Question

i m installing Rails 3 on my windows. I installed latest ruby 2.0.0, and i updated gems. but when i installing rails by using gem install rails , successful message has come but at last i found

 ERROR:  Error installing rails:
     The 'atomic' native gem requires installed build tools

    Please update your PATH to include build tools or download the DevKit
    from 'http://rubyinstaller.org/downloads' and follow the instructions
    at 'http://github.com/oneclick/rubyinstaller/wiki/Development-Kit'

plese help me...

Answer 1

I have also gone through the same problem. After doing a lot of research, I found a solution that works.

Run this command:

pik list

It should show you

187: ruby 1.8.7 (2010-08-16 patchlevel 302) [i386-mingw32]
192: ruby 1.9.2p290 (2011-07-09) [i386-mingw32]
193: ruby 1.9.3p327 (2012-11-10) [i386-mingw32]
200: ruby 2.0.0p247 (2013-06-27) [i386-mingw32]

If it's not pointing to Ruby version 200 then run the following:

pik use 200

Now run the following to enhance DevKit to your installed Ruby:

ruby dk.rb install

Finally, run the following:

gem install rails

This will install latest Rails version 4 for Ruby 2.0.