在构建lib时 出现错误

prdPath：'dist/'

         ^

SyntaxError: Unexpected token ILLEGAL

    at exports.runInThisContext (vm.js:53:16)

    at Module._compile (module.js:373:25)

    at Object.Module._extensions..js (module.js:416:10)

    at Module.load (module.js:343:32)

    at Function.Module._load (module.js:300:12)

    at Module.require (module.js:353:17)

    at require (internal/module.js:12:17)

    at Liftoff.handleArguments (C:\Users\Mac\AppData\Roaming\npm\node_modules\gulp\bin\gulp.js:116:3)

    at Liftoff.<anonymous> (C:\Users\Mac\AppData\Roaming\npm\node_modules\gulp\node_modules\._liftoff@2.3.0@liftoff\index.js:198:16)

    at module.exports (C:\Users\Mac\AppData\Roaming\npm\node_modules\gulp\node_modules\._flagged-respawn@0.3.2@flagged-respawn\index.js:17:3)

请问这是什么情况