'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

I had the same problem. I used powershell to check my path

ps> $s = $env:path

ps> $s.split("{;}")

sure enough my the ruby mingw was not in the path. I had the ruby\bin in the path but the mingw\bin was under a different folder. I went into my environment path and added it and my install worked.