While trying to deploy hubot, npm keeps complaining about unmet dependencies. The documentation does not explain how to get around this.
yum install npm --enabl
I don't know WHY it didn't work but I was having a similar problem installing bower on a Centos 6.3 machine. Yum had installed inherits 2 from EPEL but version detection wasn't working. "sudo npm install -g inherits" installed a version of inherits with working version reporting and bower/grunt-cli installed fine afterwards.