Can't find Application entry file './main.js' in electron build - node.js

Question

I have an electron app and I got this error when run electron-builder build.
Error: Application entry file "main.js" in the "/project/dist/release/mac/demo.app/Contents/Resources/app.asar" does not exist. Seems like a wrong configuration.
This is package.json. I have set the main to dist/electron.js but I don't understand why it keep saying main.js doesn't exist.
...
"main": "dist/electron.js",
"build": {
"productName": "demo",
"appId": "com.auspost.pos",
"files": [
"dist/",
"node_modules/**/*",
"package.json",
"dist/electron.js"
],
"directories": {
"output": "dist/release"
},
"dmg": {
"contents": [
{
"x": 130,
"y": 220
},
{
"x": 410,
"y": 220,
"type": "link",
"path": "/Applications"
}
]
},
"win": {
"target": [
"nsis",
"msi"
],
"icon": "./electron/assets/icons/win/app.ico"
},
"publish": {
"provider": "github"
}
},
...
"devDepencencies": {
"electron": "^5.0.2",
"electron-builder": "^20.41.0",
"electron-webpack": "^2.6.2",
}

Answer 1

Finally figure out that because the project has electron-webpack dependency which works as a base template for electron build configuration. There are some fields are defined there which get extended.
The fix for that is either remove electron-webpack from your project dependencies or use electron-webpack convention to manage your project.

Answer 2

I had a similar issue:
Application entry file "index.js" in the ".....\dist\win-unpacked\resources\app.asar" does not exist.
The fix for me was to add
main: "main.js"
in the package.json of the generated app, so .\app\package.json.
Seems like without this electron-builder 21 (electron 6) is looking for a "index.js" file.

Answer 3

I encountered the error when selecting the production version of my entry file which was in a different folder than the source production file.
Here is the relevant config section that got my app to build:
"build": {
"files": [
"electron-settings.json",
"package.json"
],
"extraResources": [
{
"from": "../build/backend/min",
"to": "app",
"filter": [
"**/*"
]
},
{
"from": "desktop/node_modules",
"to": "node_modules"
}
],
"mac": {
"extraResources": [
{
"from": "build/osx",
"to": "app/build/osx"
}
]
}
}