Can't install json (Ruby doesn't work)
<p>windows 10. ruby 2.2.4. I've tried all the devkit stuff and whatever to fix this. I've looked stuff up for hours and hours with no success. When I try to bundle it doesn't install json. When I try to install json it says </p>

<pre><code>"Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing json:
        ERROR: Failed to build gem native extension.

    C:/Ruby22-x64/bin/ruby.exe -r ./siteconf20160303-4132-alefq2.rb extconf.rb
creating Makefile

make "DESTDIR=" clean
'make' is not recognized as an internal or external command,
operable program or batch file.

make "DESTDIR="
'make' is not recognized as an internal or external command,
operable program or batch file.

make failed, exit code 1

Gem files will remain installed in C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/json-1.8.3 for inspection.
Results logged to C:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0/json-1.8.3/gem_make.out"
</code></pre>