message: default value works fine for this
diff: /* eslint-env node */
  'use strict';
  -const os = require('os');
  -
  module.exports = function(/* deployTarget */) {
  let ENV = {
  build: {
  environment: 'production'
  - },
  - git: {
  - worktreePath: `${os.tmpdir()}/deploy-boxel`
  }
  };
  return ENV;
  