npm issues and how i fixed it

gistfile1.txt

$ npm install....
//an error occured 
> [email protected] postinstall /Applications/XAMPP/xamppfiles/htdocs/myproject/wp-content/themes/Foundationpress
> bower install && gulp build

module.js:474
    throw err;
    ^

Error: Cannot find module 'internal/fs'
    at Function.Module._resolveFilename (module.js:472:15)
    at Function.Module._load (module.js:420:25)
    at Module.require (module.js:500:17)
    at require (internal/module.js:20:19)
    at evalmachine.<anonymous>:17:20
    at Object.<anonymous> (/Applications/XAMPP/xamppfiles/htdocs/myproject/wp-content/themes/Foundationpress/node_modules/bower/node_modules/graceful-fs/fs.js:11:1)
    at Module._compile (module.js:573:32)
    at Object.Module._extensions..js (module.js:582:10)
    at Module.load (module.js:490:32)
    at tryModuleLoad (module.js:449:12)
npm ERR! Darwin 16.7.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install"
npm ERR! node v7.0.0
npm ERR! npm  v3.10.8
npm ERR! code ELIFECYCLE
npm ERR! [email protected] postinstall: `bower install && gulp build`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] postinstall script 'bower install && gulp build'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the foundationpress package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     bower install && gulp build
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs foundationpress
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls foundationpress
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Applications/XAMPP/xamppfiles/htdocs/myproject/wp-content/themes/Foundationpress/npm-debug.log

		---------------------------------------------------------------------------------------------------------------------------------------------------------------
		// How i Fixed that ? 
$ rm -rf /usr/local/lib/node_modules/npm
$ sudo n 6.
$ sudo npm install -g [email protected]
$ sudo npm install -g npm@next
$ sudo n 7.
//then i can run $npm run watch .. to start the gulp and the lint  --- > end of gist