machine:
  environment:
    PATH: "${PATH}:${HOME}/${CIRCLE_PROJECT_REPONAME}/node_modules/.bin"
  node:
    version:
      6.9.4
dependencies:
  cache_directories:
    - ~/.cache/yarn
  override:
    - yarn
test:
  override:
    - yarn test

machine:
  environment:
    PATH: "${PATH}:${HOME}/${CIRCLE_PROJECT_REPONAME}/node_modules/.bin"
  node:
    version:
      6.10.0
dependencies:
  cache_directories:
    - ~/.cache/yarn
  override:
    - yarn
test:
  override:
    - yarn test

Use node 6.10.0 on CircleCI
Use node 6.10.0 on CircleCI
