title: npm install from local packages only
body: <p>I'm familiar with Python's package manager <code>pip</code>. Pip has an option to specify "<a href="https://pip.pypa.io/en/stable/user_guide/#installing-from-local-packages" rel="nofollow">never make any network calls</a>, all packages and dependencies should be fetched from a local directory".</p>
  
  <p>Is something similar possible with npm?</p>
  
  <p>I want a lighter weight build process, and want all the node packages to be installed from a local folder with .tgz files or similar.</p>