electron-packager not installing all modules from node_modules

Question

electron-packager . not installing all modules from node_modules on Darwin platform.

When trying to start such packaged app, following error occurs:

Uncaught Exception:
Error: Cannot find module 'sudo-prompt'
    at Module._resolveFilename (module.js:470:15)
    at Function.Module._resolveFilename

Both package.json and node_modules are in current folder.

I’ve tried to remove node_modules completely and refresh them with npm install -production but it didn't help to package the app correctly.

package.json

"main": "app.js",
  "scripts": {
    "start": "electron ."
  },
  "devDependencies": {
    "chokidar": "^1.7.0",
    "electron": "^1.6.11",
    "filesize": "^3.5.6",
    "jquery": "^3.2.1",
    "keymaster": "^1.6.2",
    "open": "0.0.5",
    "peity": "^3.2.1",
    "sudo-prompt": "^7.1.0",
    "underscore": "^1.8.3",
    "unzip-stream": "^0.1.2"
  },
  "dependencies": {
    "chart.js": "^2.6.0",
    "filesize": "^3.5.10",
    "open": "0.0.5",
    "sudo-prompt": "^7.1.0"
  }

Packaged app with electron-packager has only chart.js All other dependencies are missing.

.app/Contents/Resources/app $ npm ls
└─┬ [email protected]
  ├─┬ [email protected]
  │ ├─┬ [email protected]
  │ │ └── [email protected]
  │ └── [email protected]
  └── [email protected]

Answer 1

Just in case someone faces similar problem:

Removing duplicated dependencies modules from devDependencies solved the issue.