NPM install not working on OpenShift (via rhc ssh) (permissions) - node.js

Question

Get into remote ssh via:
rhc ssh <myapp>
Need to intall a module:
npm install koa --save
Gives the result:
npm http GET https://registry.npmjs.org/koa
npm http 304 https://registry.npmjs.org/koa
npm WARN engine koa#0.19.1: wanted: {"node":">= 0.11.16","iojs":">= 1.0.0"} (current: {"node":"v0.11.11","npm":"1.3.25"})
npm ERR! Error: EACCES, mkdir '/var/lib/openshift/55397f875973ca0497xxxxxx/node_modules'
npm ERR! { [Error: EACCES, mkdir '/var/lib/openshift/55397f875973ca0497xxxxxx/node_modules']
npm ERR! stack: 'Error: EACCES, mkdir \'/var/lib/openshift/55397f875973ca0497xxxxxx/node_modules\'',
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! path: '/var/lib/openshift/55397f875973ca0497xxxxxx/node_modules',
npm ERR! fstream_type: 'Directory',
npm ERR! fstream_path: '/var/lib/openshift/55397f875973ca0497xxxxxx/node_modules/koa',
npm ERR! fstream_class: 'DirWriter',
npm ERR! fstream_stack:
npm ERR! [ '/var/lib/openshift/55397f875973ca0497xxxxxx/app-root/data/node-v0.11.11-linux-x64/lib/node_modules/npm/node_modules/fstream/lib/writer.js:171:23',
npm ERR! '/var/lib/openshift/55397f875973ca0497xxxxxx/app-root/data/node-v0.11.11-linux-x64/lib/node_modules/npm/node_modules/mkdirp/index.js:37:53',
npm ERR! 'Object.oncomplete (fs.js:97:15)' ] }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

Answer 1

The error says it all: Error: "EACCES, mkdir '/var/lib/....'". npm is trying to make a directory with the 'mkdir' command. Normally this needs specific privileges.
Run the npm install with sudo and you should be good to go!
sudo npm install koa --save
Also it is looking for "node":">= 0.11.16","iojs":">= 1.0.0" and you have "node":"v0.11.11"
Try a version manager like so:
sudo npm install n -g
sudo n 0.4.12 // replace with the version you want
or you could specify 'stable' to get the latest stable build:
sudo npm install n -g
sudo n stable