gem install json -v 1.7.3 gives 'Please update your PATH to include build tools'

Question

When I run:

rails new blog

I get:

Installing json (1.7.3)
Gem::InstallError: The \'json\' native gem requires installed b         


        

Answer 1

If you know that you have the proper DevKit installed (eg: via chocolatey), then you simply need to run the included script to set up environment variables.

In cmd:

C:\> d:\path\to\DevKit2\devkitvars.bat

In PowerShell:

PS> . d:\path\to\DevKit2\devkitvars.ps1

These scripts will set up the correct paths in your current command window.