"No module named lilylib"

[Davide Benini]

Hello folks.
I am using using lilypond-book to embed some music fragments in a latex 
document.
So far I had been using lilypond on a powerpc mac, and everything went 
smooth.
Now I had to switch to an Intel mac, an things are not working. I am using 
lilypond 2.10.19-1

I launch lilypond-book with this command

lilypond-book --pdf --format=latex --output=finalOutput joyce.tex

and I get this log:

Traceback (most recent call last):
 File "/Applications/LilyPond.app/Contents/Resources/bin/lilypond-book", 
line 44, in ?
   import lilylib as ly
ImportError: No module named lilylib

Quite weirdly, I get the same error with lilypond-book without any argument 
or option.

I guess this has something ti do with paths, althoughI have already added 
/Applications/LilyPond.app/Contents/Resources/bin to my bash $PATH.

Any suggestion?
Cheers,
Davide

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