Failed to package under Windows 10

[karoyqiu]

Pre-flight checklist

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project uses.
• I have searched the issue tracker for a bug that matches the one I want to file, without success.

Electron Forge version

6.0.0-beta.61

Electron version

v15.1.2

Operating system

Windows 10 (20H2, 19042.1288)

Last known working Electron Forge version

No response

Expected behavior

Package the application.

Actual behavior

Package fails.

Steps to reproduce

Run the commands below in Command Prompt:

> yarn create electron-app test-electron-forge
> cd test-electron-forge
> set DEBUG=electron-forge:*
> yarn package

Additional information

My command output:

> yarn create electron-app test-electron-forge
yarn create v1.22.5
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Installed "[email protected]" with binaries:
      - create-electron-app
✔ Initializing Project Directory
✔ Initializing Git Repository
✔ Locating custom template: "base"
✔ Copying Starter Files
✔ Initializing NPM Module
✔ Installing Template Dependencies
✔ Installing NPM Dependencies
Done in 18.94s.

> cd test-electron-forge
> set DEBUG=electron-forge:*
> yarn package
yarn run v1.22.5
$ electron-forge package
WARNING: DEBUG environment variable detected. Append the electron-forge:lifecycle namespace
to the value of DEBUG in order to view progress indicators.
  electron-forge:async-ora Process Started: Checking your system +0ms
  electron-forge:check-system checking system, create ~/.skip-forge-system-check to stop doing this +0ms
  electron-forge:async-ora Process Succeeded: Checking your system -- after 223ms +223ms
WARNING: DEBUG environment variable detected. Append the electron-forge:lifecycle namespace
to the value of DEBUG in order to view progress indicators.
  electron-forge:async-ora Process Started: Preparing to Package Application for arch: x64 +0ms
  electron-forge:project-resolver searching for project in: C:\Users\<username>\source\repos\test-electron-forge +0ms
  electron-forge:project-resolver electron-forge compatible package.json found in C:\Users\<username>\source\repos\test-electron-forge\package.json +2ms
  electron-forge:packager packaging with options {
  asar: false,
  overwrite: true,
  dir: 'C:\\Users\\<username>\\source\\repos\\test-electron-forge',
  arch: 'x64',
  platform: 'win32',
  afterCopy: [ [AsyncFunction (anonymous)] ],
  afterExtract: [ [AsyncFunction (anonymous)] ],
  afterPrune: [ [AsyncFunction (anonymous)] ],
  out: 'C:\\Users\\<username>\\source\\repos\\test-electron-forge\\out',
  electronVersion: '15.1.2',
  quiet: true
} +0ms

An unhandled rejection has occurred inside Forge:
[Error: EISDIR: illegal operation on a directory, realpath '<my-temp-dir>\electron-packager\win32-x64-template'] {
  errno: -4068,
  code: 'EISDIR',
  syscall: 'realpath',
  path: '<my-temp-dir>\\electron-packager\\win32-x64-template'
}

Electron Forge was terminated. Location:
{}
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[karoyqiu]

After some research, I've found that the error is from fs.realpath.native. The I found this issue: nodejs/node#6861 (comment). That is exactly what I met. So this issue closed here.