npm install failing on AWS EC2

Im installing node on an AWS EC2 instance,

following instrucions from here: http://ift.tt/xDwEm3

but is not working, im getting the following error:

npm ERR! Linux 4.1.7-15.23.amzn1.x86_64 npm ERR! argv "node" "/home/ec2-user/npm/cli.js" "install" "marked-man" "--no-global" npm ERR! node v0.6.8 npm ERR! npm v3.3.5

npm ERR! Object # has no method 'exists' npm ERR! npm ERR! If you need help, you may report this error at: npm ERR!
http://ift.tt/1wdyVck

npm ERR! Please include the following file with any support request: npm ERR! /home/ec2-user/npm/npm-debug.log npm ERR! code 1 make[1]: * [node_modules/.bin/marked-man] Error 1 make[1]: Leaving directory `/home/ec2-user/npm' make: * [man/man1/npm-edit.1] Error 2