Trouble with fonts on Linux

[Jon Arnold]

Hi-

I'm working on a piece for handbells and needed to borrow some articulation 
marks from (gasp) a Finale font.

I have the font in my ~/.fonts directory, have refreshed my cache, and can 
use it in other programs (LibreOffice, etc.). The font also shows up with 
"lilypond -dshow-available-fonts x"

I am trying to call it in this way:

gyro = \markup {
  \fontsize #4 \override #'(font-name . "Finale Percussion") { ! }
}

This works on Windows, but does not seem to work on Linux despite the font 
showing up with the above command.

Any help would be greatly appreciated.

Thanks!

Jon