Access Node module on Electron child process after compiling - node.js

Question

I am making an App with electron and in the main process, i make an xml parser using child process with the following code:
xmlparser.js
const {parseString} = require('xml2js')
const moment = require('moment')
const testStrangeLayer = new RegExp(/^\de-\d$/)
const parseXML = function(str) {
try {
parseString(
//parse function goes here
)
} catch(e) {
process.exit(3)
}
}
process.on('message',parseXML)
and it is consumed with this:
consumer.js
const fork = require('child_process').fork
const proc = fork('xmlparser.js')
let result
proc.on('message',function(m){
result = m
console.log('parse successful')
proc.kill()
})
proc.on('exit',function(code,signal){
if(code) {
console.error('parsing error')
} else {
console.log(result)
}
})
proc.send(data)
When i am on development stage, this works just fine. The problem comes after i compile the app. And here's the error i found:
Error: Cannot find module 'xml2js'
at Function.Module._resolveFilename (module.js:543:15)
at Function.Module._load (module.js:473:25)
at Module.require (module.js:586:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (C:\<Path to App Folder>\resources\other-scripts\app\xmlp
arser.js:1:178)
at Object.<anonymous> (C:\<Path to App Folder>\resources\other-scripts\app\xmlp
arser.js:53:3)
at Module._compile (module.js:642:30)
at Object.Module._extensions..js (module.js:653:10)
at Module.load (module.js:561:32)
at tryModuleLoad (module.js:504:12)
parsing error
(node:10888) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): #<Object>
(node:10888) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejection
s that are not handled will terminate the Node.js process with a non-zero exit code.
module.js:545
throw err;
^
I wonder what went wrong, i even already add 'child_process' to the project's dependency list. And my aim is to distribute this app without client installing nodejs on their machine.
Thanks for your helps