'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 have gem json installed with versions 1.8.1 but I was not able to solve this issue for json 1.6.1 using

gem install json --platform=ruby --verbose

So, I tried from here https://github.com/oneclick/rubyinstaller/issues/184

gem update --system 2.0.3

And after that

gem install json -v 1.6.1 --platform=ruby --verbose

It solve issue specific to json 1.6.1 for Win 7(64 bit) machine