\defaultfontfeatures[MonaspaceKrypton-Regular]
{
  Extension=.otf,
  UprightFont=MonaspaceKrypton-Regular,
  ItalicFont=MonaspaceKrypton-Italic,
  BoldFont=MonaspaceKrypton-SemiBold,
  BoldItalicFont=MonaspaceKrypton-SemiBoldItalic
}