Particle install fail

$ sudo npm install -g particle-cli
Password:
/
> serialport@2.1.1 preinstall /opt/local/lib/node_modules/particle-cli/node_modules/serialport
> npm install node-pre-gyp node-pre-gyp-github

npm WARN optional dep failed, continuing ecc-jsbn@0.0.1
npm WARN optional dep failed, continuing ecc-jsbn@0.0.1
npm ERR! Darwin 14.5.0
npm ERR! argv "/opt/local/bin/node" "/opt/local/bin/npm" "install" "node-pre-gyp" "node-pre-gyp-github"
npm ERR! node v4.4.3
npm ERR! npm  v2.15.2
npm ERR! path ../lib/node_modules/node-pre-gyp-github/bin/node-pre-gyp-github.js
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall symlink

npm ERR! Error: EACCES: permission denied, symlink '../lib/node_modules/node-pre-gyp-github/bin/node-pre-gyp-github.js' -> '/opt/local/bin/node-pre-gyp-github'
npm ERR!     at Error (native)
npm ERR!  { [Error: EACCES: permission denied, symlink '../lib/node_modules/node-pre-gyp-github/bin/node-pre-gyp-github.js' -> '/opt/local/bin/node-pre-gyp-github']
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'symlink',
npm ERR!   path: '../lib/node_modules/node-pre-gyp-github/bin/node-pre-gyp-github.js',
npm ERR!   dest: '/opt/local/bin/node-pre-gyp-github' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! Please include the following file with any support request:
npm ERR!     /opt/local/lib/node_modules/particle-cli/node_modules/serialport/npm-debug.log
npm ERR! Darwin 14.5.0
npm ERR! argv "/opt/local/bin/node" "/opt/local/bin/npm" "install" "-g" "particle-cli"
npm ERR! node v4.4.3
npm ERR! npm  v2.15.2
npm ERR! code ELIFECYCLE

npm ERR! serialport@2.1.1 preinstall: `npm install node-pre-gyp node-pre-gyp-github`
npm ERR! Exit status 243
npm ERR!
npm ERR! Failed at the serialport@2.1.1 preinstall script 'npm install node-pre-gyp node-pre-gyp-github'.
npm ERR! This is most likely a problem with the serialport package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     npm install node-pre-gyp node-pre-gyp-github
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs serialport
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR!     npm owner ls serialport
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /npm-debug.log