setting a text font

[fiëé visuëlle]

Hi there! (this is LilyPond 2.6 on MacOSX)

I still try to typeset my lyrics in another font.

While I can't find the right place for
\override Lyrics.LyricText  #'font-name = #"Gentium"
(it doesn't complain within Staff context, but does nothing - is  
Lyrics.LyricText right?)

I checked if it works with ChordNames:
\override ChordNames.ChordName  #'font-name = #"Arial Black"

At least I get an error message:

Layout output to `mysong.ps'.../Applications/Sound/LilyPond.app/ 
Contents/Resources/share/lilypond/current/scm/framework-ps.scm: 
303:13: In expression (ly:warn (_ "Couldn't extract file matching ~a  
from ~a") name ...):
/Applications/Sound/LilyPond.app/Contents/Resources/share/lilypond/ 
current/scm/framework-ps.scm:303:13: Unbound variable: ly:warn

I guess that means that LilyPond can't find the font (but it is  
listed in the font cache!), but the error message is not really  
understandable...

Any hints?

Greetlings from Lake Constance
---
fiëé visuëlle
Henning Hraban Ramm
http://www.fiee.net
http://angerweit.tikon.ch/lieder/