  </h2>
        <p>
        A mapping between package names and repository URLs is defined in a
        <code>packages.json</code> file that is stored on
        <a href="https://github.com/nim-lang/packages">GitHub</a>.
        </p>
        <p>
        Packages are defined using a
        specially formatted <code>.nimble</code> file that is evaluated by the
        Nim compiler. This means that it supports a large subset of the
        Nim programming language, allowing various powerful features including