No Node.js 0.12 build on fedora packages:
https://apps.fedoraproject.org/packages/nodejs/builds/.
Bug on Red Hat Bugzilla:
Bug 1192647 - 0.12 is released but fedora still using 0.10.xxx
How do I install Nodejs v.0.12.* on Fedora 21?
https://ask.fedoraproject.org/en/question/66233/how-do-i-install-nodejs-v012-on-fedora-21/
Install npm packages globally without sudo on OS X and Linux:
https://github.com/sindresorhus/guides/blob/master/npm-global-without-sudo.md