Estoy tratando de instalar el módulo hubot-nagios4. Cada vez que intento instalar con el comando sudo npm install hubot-nagios4 --save, aparece el siguiente error. Actualmente estoy usando la versión 6.9.1 del nodo y la versión 3.10.1 de npm.

 unameit@Unameit:~/node/example2$ sudo npm install hubot-nagios4 --save > contextify@0.1.15 install /home/unameit/node/example2/node_modules/contextify > node-gyp rebuild gyp WARN EACCES user "root" does not have permission to access the dev dir "/home/unameit/.node-gyp/6.9.1" gyp WARN EACCES attempting to reinstall using temporary dev dir "/home/unameit/node/example2/node_modules/contextify/.node-gyp" gyp WARN install got an error, rolling back install gyp WARN install got an error, rolling back install gyp ERR! configure error gyp ERR! stack Error: unable to get local issuer certificate gyp ERR! stack at Error (native) gyp ERR! stack at TLSSocket.<anonymous> (_tls_wrap.js:1062:38) gyp ERR! stack at emitNone (events.js:86:13) gyp ERR! stack at TLSSocket.emit (events.js:185:7) gyp ERR! stack at TLSSocket._finishInit (_tls_wrap.js:586:8) gyp ERR! stack at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:416:38) gyp ERR! System Linux 3.13.0-74-generic gyp ERR! command "/mnt/node/node-v6.9.1-linux-x86/bin/node" "/mnt/node/node-v6.9.1-linux-x86/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild" gyp ERR! cwd /home/unameit/node/example2/node_modules/contextify gyp ERR! node -v v6.9.1 gyp ERR! node-gyp -v v3.4.0 gyp ERR! not ok npm WARN example2@0.0.0 No repository field. npm ERR! Linux 3.13.0-74-generic npm ERR! argv "/mnt/node/node-v6.9.1-linux-x86/bin/node" "/usr/local/bin/npm" "install" "hubot-nagios4" "--save" npm ERR! node v6.9.1 npm ERR! npm v3.10.8 npm ERR! code ELIFECYCLE npm ERR! contextify@0.1.15 install: `node-gyp rebuild` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the contextify@0.1.15 install script 'node-gyp rebuild'. 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 contextify package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! node-gyp rebuild npm ERR! You can get information on how to open an issue for this project with: npm ERR! npm bugs contextify npm ERR! Or if that isn't available, you can get their info via: npm ERR! npm owner ls contextify npm ERR! There is likely additional logging output above. npm ERR! Please include the following file with any support request: npm ERR! /home/unameit/node/example2/npm-debug.log

Por favor asiste