uglifyjs-webpack-plugin のせいで npm install ができない

AWS EC2 インスタンスで下記のような感じのエラーが出て npm install ができない

npm ERR! Linux 4.4.0
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "install"
npm ERR! node v4.2.6
npm ERR! npm  v3.5.2
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn

npm ERR! uglifyjs-webpack-plugin@0.4.6 postinstall: `node lib/post_install.js`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the uglifyjs-webpack-plugin@0.4.6 postinstall script 'node lib/post_install.js'.
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 uglifyjs-webpack-plugin package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node lib/post_install.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs uglifyjs-webpack-plugin
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls uglifyjs-webpack-plugin
npm ERR! There is likely additional logging output above.

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

解決方法１

npm cache clean をしてみる
https://github.com/webpack-contrib/uglifyjs-webpack-plugin/issues/113

解決方法２

環境によっては nodejs をインストールしてもがリンクされない
apt-get install nodejs-legacy で node をいれてみる
https://github.com/webpack-contrib/uglifyjs-webpack-plugin/issues/129#issuecomment-355157180