Npm is upgraded but ember-cli tells different

I upgraded npm to 3.x as you can see. But when I check “ember version”, the npm is still the old version 2.x. Is this a problem?

$ whereis npm
npm: /usr/sbin/npm /usr/local/bin/npm

$ npm version
{ 'hillwave-ember-js': '0.0.0',
  npm: '3.7.1',
  ares: '1.10.1-DEV',
  http_parser: '2.5.0',
  icu: '56.1',
  modules: '46',
  node: '4.2.3',
  openssl: '1.0.2e',
  uv: '1.7.5',
  v8: '',
  zlib: '1.2.8' }

$ ember version
version: 2.3.0-beta.2
Could not start watchman; falling back to NodeWatcher for file system events.
Visit for more info.
node: 4.2.3
npm: 2.14.10
os: linux x64