title: Go: cannot run non main package?
body: <p>I always get error </p>
  
  <blockquote>
    <p>cannot run non-main package</p>
  </blockquote>
  
  <p>Its just a code from <a href="https://github.com/NebulousLabs/fastrand" rel="nofollow noreferrer">github</a>.</p>