Ruby Versions > 2.0.0

Currently, the default buildpack doesn't support ruby versions > 2.0.0 .

Please verify that the desired ruby version is configured within your Gemfile (e.g. ruby '2.1.0' )

To be able to use ruby versions > 2.0.0 you have to manually specify a buildpack when deploying apps to anynines: 

cf push --buildpack https://github.com/heroku/heroku-buildpack-ruby.git

If you encounter errors while deploying ruby applications with ruby versions > 2.0.0, please set the STACK environment variable to the value cedar for your deployment using your manifest.yml file or the cf CLI like this:

cf set-env <APP_NAME> STACK cedar

For more information on the needed environment variables please refer to our blog post.