configured virtual machine using VirtualBox and Vagrant.</p>
    <p>Full instructions for setting up the tools and building SIL fonts are available on a dedicated web site: <a href="https://silnrsi.github.io/silfontdev/">SIL Font Development Notes</a>.</p>
    <p>For building variable fonts (at this time, an experimental format for SIL fonts) run (on Linux and macOS; Windows requires slightly different commands):</p>
    <ul>
    <li>python3 -m venv variable</li>
    <li>source variable/bin/activate</li>
  