different notation fonts and LilyPond’s -b option

[Malte Meyn]

Hi list,

I wanted to try Knut’s advice from the Gotlandstoner thread 
(https://lists.gnu.org/archive/html/lilypond-user/2017-09/msg00013.html) 
but the -b option doesn’t seem to work with different notation fonts; 
Ghostscript fails and outputs a PDF without any fonts (it doesn’t even 
contain TeXGyreSchola). Minimal example:

%% BEGIN bigtest.ly %%

\version "2.19.65"

\paper {
  #(define fonts
     (set-global-fonts
      #:music "haydn"
      #:factor (/ staff-height pt 20)))
}

\relative {
  c' d e f g a b c
}

%% END bigtest.ly %%

The Haydn fonts are installed correctly, without the -b option there’s 
no problem. Any ideas why -b doesn’t work?

Attached you find the differing parts of the logs of
        lilypond -b -lDEBUG bigtest.ly 2> bigtest.log
and
        lilypond    -lDEBUG bigtest.ly 2> test.log

bigtest.log
Description: Text Data

test.log
Description: Text Data