Use environment variables, EMBER_ENV in .ember-cli settings

Is there a way to use EMBER_ENV and other environment variables in the .ember-cli default settings file, so something like the following is possible?

/** 
 *  Sample .ember-cli settings file
 *  to set the --output-path command
 *  line option to be an environment
 *  specific subdirectory of ./dist
 */
{
  "disableAnalytics": false,
  "outputPath": "dist/${EMBER_ENV}"
}