Install error

[dyzdyz010]

I'm using Mac OS X El Capitan Beta with NPM version 2.14.1, and I got errors below:

$ sudo npm install -g duo

> [email protected] install /usr/local/lib/node_modules/duo/node_modules/duo-cache/node_modules/level/node_modules/leveldown
> prebuild --download

prebuild WARN install ENOENT, open '/Users/DYZ/.npm/_prebuilds/https-github.com-level-leveldown-releases-download-v1.4.1-leveldown-v1.4.1-node-v14-darwin-x64.tar.gz.8746-02270bb.tmp'
prebuild ERR! build EACCES, mkdir '/Users/DYZ/.node-gyp/0.12.4'
npm ERR! Darwin 15.0.0
npm ERR! argv "node" "/usr/local/bin/npm" "install" "-g" "duo"
npm ERR! node v0.12.4
npm ERR! npm  v2.10.1
npm ERR! code ELIFECYCLE

npm ERR! [email protected] install: `prebuild --download`
npm ERR! Exit status 2
npm ERR! 
npm ERR! Failed at the [email protected] install script 'prebuild --download'.
npm ERR! This is most likely a problem with the leveldown package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     prebuild --download
npm ERR! You can get their info via:
npm ERR!     npm owner ls leveldown
npm ERR! There is likely additional logging output above.

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

[fredwangsap]

same issue