title: webpack: Cannot read property 'match' of undefined
body: <p>I have installed webpack (Symfony encore) using npm as follows:</p>
  
  <p><code>sudo npm install -g @symfony/webpack-encore --save-dev</code></p>
  
  <p>I ran this from <code>/var/www/project</code> </p>
  
  <p>I was required to install globally due to issues with package managers and shared folders when dealing with Windows host / Linux guest.</p>
  
  <p>I cannot install webpack (node_modules) in the same directory (or under it) as the <code>/var/www/project</code> </p>
  
  <p>So my package.json file looks like this:</p>
  
  <pre><code>{
    "name": "test",
      "version": "1.0.0",
    "description": "This is a test",
    "main": "index.js",
    "dependencies": {},
    "devDependencies": {
      "@symfony/webpack-encore": "^0.15.0"
    },
    "scripts": {
      "test": "echo \"Error: no test specified\" &amp;&amp; exit 1"
    },
    "author": "Alex",
      "license": "MIT"
  }
  </code></pre>
  
  <p>I run encore from <code>/var/www/project</code> using this</p>
  
  <p><code>/usr/local/bin/encore dev</code></p>
  
  <p>I get this lovely output in return:</p>
  
  <pre><code>Running webpack ...
  
    TypeError: Cannot read property 'match' of undefined
  
    - index.js:125 parse
      [lib]/[webpack-encore]/[yargs-parser]/index.js:125:12
  
    - index.js:761 Function.Parser.detailed
      [lib]/[webpack-encore]/[yargs-parser]/index.js:761:10
  
    - yargs.js:938 Object.Yargs.self._parseArgs
      [lib]/[webpack-encore]/[yargs]/yargs.js:938:27
  
    - yargs.js:927 Object.get [as argv]
      [lib]/[webpack-encore]/[yargs]/yargs.js:927:19
  
    - index.js:725 Object.configureRuntimeEnvironment
      [lib]/[@symfony]/webpack-encore/index.js:725:54
  
    - index.js:770 Proxy.parameters
      [lib]/[@symfony]/webpack-encore/index.js:770:45
  
    - webpack.config.js:3 Object.&lt;anonymous&gt;
      /var/www/project/webpack.config.js:3:8
  
    - module.js:573 Module._compile
      module.js:573:30
  
    - module.js:584 Object.Module._extensions..js
      module.js:584:10
  
    - module.js:507 Module.load
      module.js:507:32
  </code></pre>
  
  <p>What am I missing?</p>