message: Inject environment merged from all sources into the string expansion helper.
diff: @@ -549,6 +549,7 @@ export abstract class CMakeDriver implements vscode.Disposable {
  return this.doRefreshExpansions(async () => {
  log.debug('Run _refreshExpansions cb');
  const opts = this.expansionOptions;
  + opts.envOverride = await this.getConfigureEnvironment();
  this._sourceDirectory = await util.normalizeAndVerifySourceDir(await expand.expandString(this.config.sourceDirectory, opts));
  if (!this.useCMakePresets) {
  