message: fix: ci build
diff: @@ -2,7 +2,9 @@ import { IApi } from '@umijs/types';
  export default (api: IApi) => {
  api.chainWebpack(memo => {
  + if (process.env.UMI_DIR) {
  memo.resolve.alias.set('umi', process.env.UMI_DIR);
  + }
  return memo;
  });
  };
  