lilypond-book.py broken?

[Colin Campbell]

I've just done a git pull -r and make doc, but it breaks with the following:
> make[3]: Entering directory `/home/colin/lilypond-git/input/regression'
> LILYPOND_VERSION=2.13.24 /usr/bin/python 
> ../../scripts/lilypond-book.py -I ./ -I ./out-www -I ../../input -I 
> /home/colin/lilypond-git/Documentation -I 
> /home/colin/lilypond-git/Documentation/snippets -I 
> ../../input/regression/ -I 
> /home/colin/lilypond-git/Documentation/included/ -I 
> /home/colin/lilypond-git/mf/out/ -I /home/colin/lilypond-git/mf/out/ 
> -I /home/colin/lilypond-git/Documentation/pictures -I 
> /home/colin/lilypond-git/Documentation/pictures/./out-www 
> --process='/home/colin/lilypond-git/out/bin/lilypond -I ./ -I 
> ./out-www -I ../../input -I /home/colin/lilypond-git/Documentation -I 
> /home/colin/lilypond-git/Documentation/snippets -I 
> ../../input/regression/ -I 
> /home/colin/lilypond-git/Documentation/included/ -I 
> /home/colin/lilypond-git/mf/out/ -I /home/colin/lilypond-git/mf/out/ 
> -I /home/colin/lilypond-git/Documentation/pictures -I 
> /home/colin/lilypond-git/Documentation/pictures/./out-www 
> -dbackend=eps --formats=ps,png,pdf -djob-count=3 -dinclude-eps-fonts 
> -dgs-load-fonts --header=doctitle --header=doctitlede 
> --header=doctitlees --header=doctitlefr --header=doctitlehu 
> --header=doctitleit --header=doctitleja --header=doctitlenl 
> --header=texidoc --header=texidocde --header=texidoces 
> --header=texidocfr --header=texidochu --header=texidocit 
> --header=texidocja --header=texidocnl -dcheck-internal-types 
> -ddump-signatures -danti-alias-factor=2' --output=./out-www 
> --format=texi-html   --lily-output-dir 
> /home/colin/lilypond-git/out/lybook-db/ out-www/collated-files.tely
> langdefs.py: warning: lilypond-doc gettext domain not found.
> Traceback (most recent call last):
>   File "../../scripts/lilypond-book.py", line 67, in <module>
>     import book_base as BookBase
> ImportError: No module named book_base
> make[3]: *** [out-www/collated-files.texi] Error 1
> make[3]: Leaving directory `/home/colin/lilypond-git/input/regression'
> make[2]: *** [WWW-1] Error 2
> make[2]: Leaving directory `/home/colin/lilypond-git/input'
> make[1]: *** [WWW-1] Error 2
> make[1]: Leaving directory `/home/colin/lilypond-git'
> make: *** [doc-stage-1] Error 2
The error seems to point to lilypond-book.py and I get the same error 
after make doc-clean && make doc or make doc-stage-1

regards,
Colin

--
I stay cool and dig all jive, That's the way I stay alive.
My motto, as I live and learn, is "Dig and be dug in return."
   - Langston Hughes