Browserify copies modules multiple times

[anhang]

I have this file structure in Rails

app:
  assets:
    javascripts:
      application.js
      components:
        my_component.js
      utils:
        my_util.js

application.js requires my_util.js and my_component.js
my_component.js requires my_util.js

Browserify outputs 2 copies of my_util.js. This is causing my codebase to be way too big.

My package.json

{
  "name": "MyApp",
  "dependencies": {
    "babel-plugin-syntax-async-functions": "^6.13.0",
    "babel-plugin-transform-regenerator": "^6.3.18",
    "babel-polyfill": "^6.23.0",
    "babel-preset-es2015": "^6.3.13",
    "babel-preset-react": "^6.24.1",
    "babel-preset-stage-0": "^6.24.1",
    "babelify": "^7.2.0",
    "browserify": "^14.3.0",
    "browserify-incremental": "^3.0.1",
    "browserify-resolutions": "^1.1.0",
    "es6-promise": "^4.1.0",
    "fetch": "^1.1.0",
    "jquery": "^3.2.1",
    "jquery-ujs": "^1.2.2",
    "react": "^15.5.4"
  },
  "license": "MIT",
  "engines": {
    "node": ">= 0.10"
  }
}

My application.rb:

    config.browserify_rails.paths << /vendor\/assets\/javascripts\/module\.js/
    config.browserify_rails.paths << './assets/javascripts/' # Added this so that I can use relative paths when calling require() to see if browserify would dedupe, but this didn't help either.
    config.browserify_rails.commandline_options = "-t [ babelify --presets [ es2015 react stage-0 ] --plugins [ syntax-async-functions transform-regenerator browserify-resolutions '*' ] ]"

[cymen]

Can you paste in the require lines from application.js and my_component.js? That would help trying to figure it out.

[cymen]

Or if it's just a demo/test thing, you could push the whole thing up to github and I'll take a look.