title: npm publish stuck (using yarn)
body: <p>I'm trying to publish a new package.
  I'm using ES6, so I'm first transpiling my files using babel.</p>
  
  <p>I'm stuck on this step:</p>
  
  <p><a href="https://i.stack.imgur.com/iIVp6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iIVp6.png" alt="enter image description here"></a></p>
  
  <p>This takes forever (waited more than an hour). No error messages, nothing happens.</p>
  
  <p>Here's my package.json prepublish script and main.js:</p>
  
  <pre><code>  "scripts": {
      "prepublish": "babel -d lib/ src/"
    }
    "main": "./lib/index.js"
  </code></pre>
  
  <p>My index.js has some ES6 imports and one module.export.
  Here's my .npmignore file:</p>
  
  <pre><code>src/
  yarn.lock
  node_modules
  </code></pre>
  
  <p>I dont have any big filex in the directory (whole directory excluding node_modules has less than 1MB).</p>
  
  <p>Thanks for any tips!</p>