message: Missed documentation on the `environmentVariables` kit option [Close
diff: @@ -236,3 +236,7 @@ In addition to the above options, the following may be specified:
  This setting is most useful when the toolchain file respects additional
  options that can be passed as cache variables.
  +
  +``environmentVariables``
  + A JSON object of key-value pairs specifying additional environment
  + variables to be defined when using this kit.
  