- \override Staff.StaffSymbol #'thickness = #2.0
- \override Staff.StaffSymbol #'line-count = #6
- \override Staff.StaffSymbol #'staff-space = #1.1
+ \override Staff.StaffSymbol.thickness = #2.0
+ \override Staff.StaffSymbol.line-count = #6
+ \override Staff.StaffSymbol.staff-space = #1.1