'Failed to build gem native extension' on Windows 7 (The system cannot find the path specified)

Question

The problem in short

I\'m on Windows and am getting the following error when running gem install json —platform=ruby:

The system canno         


        

Answer 1

Make sure that the ruby version you installed (32 or 64 bit) matches the DevKit version. They both have to be 32 or 64, which was the issue I was having. May not be the exact issue here, but thought I'd throw that out there. Here's a post worth checking out:

Rails on windows - install issue