$ npm install --save-dev ember-cli-bootstrap-sass
npm ERR! Darwin 14.0.0
npm ERR! argv "/Users/pete/.nvm/versions/node/v0.12.0/bin/node" "/Users/pete/.nvm/versions/node/v0.12.0/bin/npm" "install" "--save-dev" "ember-cli-bootstrap-sass"
npm ERR! node v0.12.0
npm ERR! npm v2.5.1
npm ERR! code ETARGET
npm ERR! notarget No compatible version found: broccoli-sass-source-maps@'>=0.7.0 <0.8.0'
npm ERR! notarget Valid install targets:
npm ERR! notarget ["0.6.2","0.6.3","1.0.0-beta.1","1.0.0-beta.4"]
npm ERR! notarget
npm ERR! notarget This is most likely not a problem with npm itself.
npm ERR! notarget In most cases you or one of your dependencies are requesting
npm ERR! notarget a package version that doesn't exist.
Thanks