\font\SILmfont={[/usr/local/texlive/2024/texmf-dist/fonts/opentype/public/libertinus-fonts/LibertinusSans-Regular.otf]:+clig;+liga;+tlig;+ss04}\SILmfont
\def\SILmfontname{Libertinus Sans Regular; Stylistic Set 4}%