npm run build报错 ,resolve is not defined

ReferenceError: resolve is not defined

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! yingyi@1.0.0 build: cross-env NODE_ENV=production webpack --progress --hide-modules
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the yingyi@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:UsersyingyiAppDataRoamingnpm-cache_logs2018-05-21T11_19_19_460Z-debug.log

function resolve (dir) {
return path.join(__dirname, ‘..‘, dir)
}