title: Install old Python 3.6 using MSYS2
body: <p>I need to recompile a <a href="https://cyberbotics.com/doc/guide/using-python" rel="nofollow noreferrer">library</a> using <strong>python 3.6</strong> instead of <strong>python 3.7</strong>. Problem is MSYS2 repository doesn't have but 3.7 version. I hope someone could show me how to install older Python 3.6 using <code>pacman</code>.</p>