These are the docs for the latest stable release of the Bolt Design System. Looking for the previous release, v2.4.2?

Environments

These values can be set in .boltrc.js files to configure the build tools:

env:
  type: string
  title: Environment Type
  description: Where is this being compiled? Pattern Lab? Drupal?
  enum:
    - pl
    - static
    - drupal