npm: referencing properties

package.json

{
  "name": "awesome-package",
  "version": "1.0.0",
  "description": "Well, an awesome package.",
  "author": "André König <andre.koenig@posteo.de>",
  "main": "index",
  "config": {
    "distdir": "dist"
  },
  "scripts": {
    "clean": "rm -rf $npm_package_config_distdir"
  }
}