Beamer - Disable Fira Font in Metropolis Theme

Is it possible to disable the Fira Font in the Metropolis theme when using LuaTex and fontspec?
I would like to have the same fallback font that Metropolis uses when compiling with LaTex.

the MVE:

documentclass{beamer}
usetheme{metropolis}      

% Font configuration
usepackage{fontspec}
usepackage{unicode-math}
     
title{A minimal example}
date{today}
author{Matthias Vogelgesang}
institute{Centre for Modern Beamer Themes}
begin{document}
  maketitle
  section{First Section}
  begin{frame}{First Frame}
    Hello, world!
  end{frame}
end{document}