title: What does "npm:" prefix in dependency section in package.json mean?
body: <p>I am wondering what does that mean:</p>
  <pre><code>&quot;dependencies&quot;: {
      &quot;@mui/styled-engine&quot;: &quot;npm:@mui/styled-engine-sc@5.3.0&quot;,
  }
  </code></pre>
  <p>What is that <code>npm:</code> prefix?</p>