title: npm unable to install scrypt. node-gyp rebuild
body: <p>I want to run a blockchain application, but I got this error.    </p>
  
  <blockquote>
    <p>npm ERR! code ELIFECYCLE<br>
        npm ERR! errno 1<br>
        npm ERR! scrypt@6.0.3 install: <code>node-gyp rebuild</code><br>
        npm ERR! Exit status 1<br>
        npm ERR! <br>
        npm ERR! Failed at the scrypt@6.0.3 install script.<br>
        npm ERR! This is probably not a problem with npm.<br></p>
  </blockquote>
  
  <p>There is likely additional logging output above.</p>
  
  <p>I have tried deleting node_modules, <code>npm</code> cache verify and <code>npm install</code> again. I have uninstalled and reinstalled <code>npm</code> and <code>nodejs</code>. My <code>npm</code> version is <code>6.12.0</code> and <code>node</code> version <code>v12.13.0</code></p>