brunch-config.js

exports.config = {
  files: {
    javascripts: {
      joinTo: "js/app.js"
    },
    stylesheets: {
      joinTo: "css/app.css",
      order: {
        before: 
          [ 
            "web/static/css/util/fonts.scss",
            "web/static/css/util/reset.scss"
          ]
      }
    }
  },

  conventions: {
    assets: /^(web\/static\/assets)/
  },

  paths: {
    watched: [
      "web/static",
      "test/static"
    ],

    public: "priv/static"
  },

  plugins: {
    babel: {
      ignore: [/web\/static\/vendor/]
    }
  },

  modules: {
    autoRequire: {
      "js/app.js": ["web/static/js/app"]
    }
  },

  npm: {
    enabled: true,
    whitelist: ["phoenix", "phoenix_html"]
  }
};

package.json

{
  "repository": {},
  "dependencies": {
    "babel-preset-es2015": "^6.14.0",
    "baconjs": "~0.7.84",
    "jquery": "file:web/static/vendor/jquery"
  },
  "devDependencies": {
    "babel-brunch": "~6.0.0",
    "brunch": "~2.8.0",
    "clean-css-brunch": "~1.8.0",
    "css-brunch": "~1.7.0",
    "javascript-brunch": "~1.8.0",
    "phoenix": "file:deps/phoenix",
    "phoenix_html": "file:deps/phoenix_html",
    "sass-brunch": "~2.6.0",
    "uglify-js-brunch": "~1.7.0"
  }
}