Threads.js and Electron - Problem after Build step with electron-builder

Hello everyone,

i got a weird problem, after building my application with electron-builder.

I do output my application as a portable for Windows, asar packaging is activated, but I unpack all my workers with "asarUnpack".

As far as I understand the build process, first output of the build process is a so called "win-unpacked" folder with an .exe file, resources folder and some other folders. When I start the .exe file in the "win-unpacked" folder, yet everything works as expected.

The 2nd part of the build process will then give me a small portable .exe file without any folder accompanying.
When I start this .exe file, the same folder as the one in the first build step ("win-unpacked") will be created temporarily somewhere in AppData/Local/Temp/xxxx folder. But in this case, my application does not work anymore, but throws JS errors, stating that the "threads" module, which should be imported into the worker, could not be found. The threads module is located somewhere inside the asar-package as a dependency.

After the first build step this reference stays available, the worker locates the "threads" module inside the asar package and imports it successfully, thus everything works as expected. After outputting and then starting the portable .exe file, it seems as if this reference is broken, although the temporarily created folder inside "AppData/Local/Temp/xXxxXX" is exactly the same folder in size and amount of data as the one from the first build step.

Maybe anyone of you has a suggestion, what my problem might be.

Edit 1: I am not using any bundler for my backend code. So the problem is not associated with bundling.
Edit 2:
- Node version: 16.13.1
- Electron version: 16.0.5
- electron-builder version: 22.14.5
- threads.js version: 1.7.0

Edit 3:
In order to reproduce this error:
1. package.json:
```
{
"name": "workertest",
"version": "1.0.0",
"description": "",
"main": "build/main.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "npm run buildElectron && electron .",
"buildElectron": "tsc",
"buildAndOutputPortable": "set NODE_ENV=production && npm run buildElectron && electron-builder"
},
"author": "",
"license": "ISC",
"build": {
"appId": "de.worker.test",
"directories": {
"output": "workerTest"
},
"files": [
"build/**/*",
"package.json"
],
"win": {
"target": "portable",
"artifactName": "workerTest.exe"
},
"asarUnpack": [
"build/workers/testWorker.js"
]
},
"devDependencies": {
"electron": "^16.0.5",
"electron-builder": "^22.14.5"
},
"dependencies": {
"threads": "^1.7.0",
"tslib": "^2.3.1"
}
}
```
2. tsconfig.json:
```
{
"compilerOptions": {
"target": "es6",
"module": "commonjs",
"moduleResolution": "node",
"noEmitOnError": true,
"lib": ["es2017", "dom"],
"strict": true,
"esModuleInterop": false,
"allowSyntheticDefaultImports": true,
"experimentalDecorators": true,
"importHelpers": true,
"outDir": "build/",
"sourceMap": true,
"inlineSources": true,
"rootDir": "./"
}
}
```
3. main.ts:
```
import { app, BrowserWindow } from 'electron';
import { spawn, Worker } from 'threads';

let testWorker : any = undefined

function createWindow () {
const win = new BrowserWindow({
width: 800,
height: 600
})

win.loadFile('index.html')
}
async function start() {
if(!testWorker) {
testWorker = await spawn(new Worker('workers/testWorker'))
}
app.whenReady().then(() => {
createWindow()
})
}
start()
```

4. index.html:
```

html,
body {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
font-family: sans-serif;
background-color: #ededed;
}
body {
display: flex;
flex-direction: column;
}

pxt-ui-app

Hello world

```
5. folder structure:
```
project-name/
|- workers
|- testWorker.ts
|- package.json
|- index.html
|- main.ts
|- tsconfig.json
```