Otherwise this variable is only available during the buildpack compile step (see: https://devcenter.heroku.com/articles/buildpack-api#stacks)
It is useful to have it always available so that an application can be deployed in a different way based on the stack.
Otherwise this variable is only available during the buildpack compile step (see: https://devcenter.heroku.com/articles/buildpack-api#stacks) It is useful to have it always available so that an application can be deployed in a different way based on the stack.