'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

How I fixed it:

1. Downloaded the latest ruby installer from https://rubyinstaller.org/downloads/
2. Ran the installer, following the prompts to install dependencies.
3. Restarted my computer.
4. Added the ruby/bin directory to my PATH.