lilypond-book: Special characters in filenames using \lilypondfile with LaTeX

[André Rohrbach]

Hi :)

I use LilyPond in combination with LaTeX since a few weeks and I'm
very happy about this great piece of software!
Yesterday I came across an issue using lilypond-book:

Just tried to use special characters (mostly spaces and single quotes)
in filenames while working with \lilypondfile.
Tried the following options

\lilypondfile{File 1.ly}
\lilypondfile{File\ 1.ly}
\lilypondfile{"File 1.ly"}
\lilypondfile{'File 1.ly'}

None of my suggestions worked.
Using \lilypondfile with files that don't have special characters in
the filename works without any problems for me.

Is there any possibility to do that kind of stuff or do I really have
to prevent using special characters?

Thanks for your great work!

Andy