I'm using npm install -g yo gulp to install yeoman and this is the error I'm getting
npm WARN deprecated cross-spawn-async@2.2.5: cross-spawn no longer requires a build toolchain, use it instead
C:\Usr\local\gulp -> C:\Usr\local\node_modules\gulp\bin\gulp.js
C:\Usr\local\yo -> C:\Usr\local\node_modules\yo\lib\cli.js
C:\Usr\local\yo-complete -> C:\Usr\local\node_modules\yo\lib\completion\index.js
> yo@3.1.0 postinstall C:\Usr\local\node_modules\yo
> yodoctor
Yeoman Doctor
Running sanity checks on your system
? No .bowerrc file in home directory
? Global configuration file is valid
? NODE_PATH matches the npm root
? No .yo-rc.json file in home directory …
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