lilypond-book.py: error: Could not overwrite file

[Dénes Harmath]

Hi all,

as the lead of the Hungarian localization team, I just downloaded and
installed LilyDev from http://www.et.byu.edu/~sorensen/lilydev-3.0.iso,
checked out commit 5b6ddab894b3065c35c72ef8048b8c6edbe684ac and tried to
compile LilyPond with the usual commands:

sh autogen.sh --noconfigure
mkdir -p build/
cd build/
../configure
make

But make fails with the following error:

LILYPOND_VERSION=2.19.25 /usr/bin/python -tt
/home/thsoft/lilypond-hu/scripts/lilypond-book.py -I
/home/thsoft/lilypond-hu/Documentation -I ./out -I
/home/thsoft/lilypond-hu/build/Documentation/snippets/out -I
/home/thsoft/lilypond-hu/Documentation/included -I
/home/thsoft/lilypond-hu/Documentation/pictures -I
/home/thsoft/lilypond-hu/Documentation -I
/home/thsoft/lilypond-hu/input/regression --process='true -dbackend=eps
--formats=ps,png,pdf  -dinclude-eps-fonts -dgs-load-fonts --header=doctitle
--header=doctitleca --header=doctitlecs --header=doctitlede
--header=doctitlees --header=doctitlefr --header=doctitlehu
--header=doctitleit --header=doctitleja --header=doctitlenl
--header=doctitlezh --header=texidoc --header=texidocca --header=texidoccs
--header=texidocde --header=texidoces --header=texidocfr --header=texidochu
--header=texidocit --header=texidocja --header=texidocnl --header=texidoczh
-dcheck-internal-types -ddump-signatures -danti-alias-factor=2'
--output=./out --format=texi --loglevel=WARN  --skip-lily-check
--lily-output-dir /home/thsoft/lilypond-hu/build/out/lybook-db
--redirect-lilypond-output /home/thsoft/lilypond-hu/Documentation/usage.tely
langdefs.py: warning: lilypond-doc gettext domain not found.
lilypond-book.py: error: Could not overwrite file
/home/thsoft/lilypond-hu/build/Documentation/out/a3/lily-8a95f028.ly
make[1]: *** [out/usage.texi] Error 1
make[1]: Leaving directory `/home/thsoft/lilypond-hu/build/Documentation'
make: *** [all] Error 2

I already retried make after make clean, but the same error happens.
Googling the error message did give any results. What could be the problem?

Thanks in advance,
thSoft