Cannot find module "./build" why?

webpack:///./~/dtrace-provider/dtrace-provider.js?:36 Error: Cannot find module "./build"
    at webpackMissingModule (webpack:///./~/dtrace-provider/dtrace-provider.js?:18)
    at eval (webpack:///./~/dtrace-provider/dtrace-provider.js?:18)
    at Object../node_modules/dtrace-provider/dtrace-provider.js (vendor.dll.js:7030)
    at __webpack_require__ (vendor.dll.js:21)
    at eval (webpack:///./~/bunyan/lib/bunyan.js?:77)
    at Object../node_modules/bunyan/lib/bunyan.js (vendor.dll.js:2165)
    at __webpack_require__ (vendor.dll.js:21)
    at Object.79 (bundle.js:184934)
    at __webpack_require__ (bundle.js:661)
    at fn (bundle.js:87)
    at Object../app/serve/logger-dtrace.js (bundle.js:37214)
    at __webpack_require__ (bundle.js:661)
    at fn (bundle.js:87)
    at Object../app/serve/server.js (bundle.js:37277)
    at __webpack_require__ (bundle.js:661)
    at fn (bundle.js:87)