npm install fails installing uglify-js

[mytypio]

npm install
npm http GET https://registry.npmjs.org/uglify-js
npm http 304 https://registry.npmjs.org/uglify-js
npm http GET https://registry.npmjs.org/optimist
npm http GET https://registry.npmjs.org/source-map
npm http GET https://registry.npmjs.org/async
npm http 304 https://registry.npmjs.org/source-map
npm ERR! error installing uglify-js@2.3.6

npm ERR! Error: No compatible version found: source-map@'>=0.1.7- <0.2.0-'
npm ERR! Valid install targets:
npm ERR! ["0.0.0","0.1.0","0.1.1","0.1.2","0.1.3"]
npm ERR! at installTargetsError (/usr/share/npm/lib/cache.js:488:10)
npm ERR! at next_ (/usr/share/npm/lib/cache.js:438:17)
npm ERR! at next (/usr/share/npm/lib/cache.js:415:44)
npm ERR! at /usr/share/npm/lib/cache.js:408:5
npm ERR! at saved (/usr/share/npm/lib/utils/npm-registry-client/get.js:147:7)
npm ERR! at Object.oncomplete (/usr/lib/nodejs/graceful-fs.js:230:7)
npm ERR! You may report this log at:
npm ERR! http://bugs.debian.org/npm
npm ERR! or use
npm ERR! reportbug --attach /var/www/assets/bootplus/npm-debug.log npm
npm ERR!
npm ERR! System Linux 3.5.0-32-generic
npm ERR! command "/usr/bin/nodejs" "/usr/bin/npm" "install"
npm ERR! cwd /var/www/assets/bootplus
npm ERR! node -v v0.6.19
npm ERR! npm -v 1.1.4
npm ERR! message No compatible version found: source-map@'>=0.1.7- <0.2.0-'
npm ERR! message Valid install targets:
npm ERR! message ["0.0.0","0.1.0","0.1.1","0.1.2","0.1.3"]

[aozora]

This is not related to bootplus, but to node & npm. From the log I see you are using an old node version (0.6.19).
IMO you should upgrade to latest node version, or at least to v0.8.x.