Re-running with clear cache fixes it. Looks like we get a wrong npm version: this has been reported here https://discuss.circleci.com/t/wrong-npm-version-with-node-5-0-5-1/827
Re-running with clear cache fixes it.
Looks like we get a wrong npm version: this has been reported here
https://discuss.circleci.com/t/wrong-npm-version-with-node-5-0-5-1/827