Failing after lb-ng in onBuildStart

[shreyas-a]

I'm using Loopback lb-ng for generating Angular 1.x services using webpack. So everytime I build the client, I need to execute lb-ng.
onBuildStart: ['lb-ng ../server/server.js lb-services.js']
After the lb-ng command is executed without any issues, return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode); Error: ENOENT: no such file or directory error is occured.