{
  "name": "flexi",
  "dependencies": {
    "ember": "release",
    "ember-cli-shims": "0.1.1",
    "hammer-time": "1.0.0"
  }
}

{
  "name": "flexi",
  "dependencies": {
    "ember": "~2.8.0",
    "ember-cli-shims": "0.1.1",
    "hammer-time": "1.0.0"
  }
}

Use actual numbers to make Travis happy
Use actual numbers to make Travis happy

Seems that pointing to ember release does not work?