error in building gypsy

Hello!

I am trying to build gnome via jhbuild on ubuntu 11.10.

I have the following error during configuring gypsy:
-------------------
*** Configuring gypsy *** [36/215]
./autogen.sh --prefix /opt/gnome --libdir '/opt/gnome/lib64'
--disable-static --disable-gtk-doc
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal
autoreconf: configure.ac: tracing
autoreconf: running: libtoolize --install --copy
libtoolize: Consider adding `AC_CONFIG_MACRO_DIR([m4])' to configure.ac and
libtoolize: rerunning libtoolize, to keep the correct libtool macros in-tree.
libtoolize: Consider adding `-I m4' to ACLOCAL_AMFLAGS in Makefile.am.
autoreconf: running: /usr/bin/autoconf
autoreconf: running: /usr/bin/autoheader
autoreconf: running: automake --add-missing --copy --no-force
gtk-doc.make:7: GTK_DOC_USE_LIBTOOL does not appear in AM_CONDITIONAL
docs/reference/Makefile.am:87:   `gtk-doc.make' included from here
gtk-doc.make:54: ENABLE_GTK_DOC does not appear in AM_CONDITIONAL
docs/reference/Makefile.am:87:   `gtk-doc.make' included from here
gtk-doc.make:55: GTK_DOC_BUILD_HTML does not appear in AM_CONDITIONAL
docs/reference/Makefile.am:87:   `gtk-doc.make' included from here
gtk-doc.make:60: GTK_DOC_BUILD_PDF does not appear in AM_CONDITIONAL
docs/reference/Makefile.am:87:   `gtk-doc.make' included from here
gtk-doc.make:261: ENABLE_GTK_DOC does not appear in AM_CONDITIONAL
docs/reference/Makefile.am:87:   `gtk-doc.make' included from here
autoreconf: automake failed with exit status: 1
*** Error during phase configure of gypsy: ########## Error running
./autogen.sh --prefix /opt/gnome --libdir '/opt/gnome/lib64'
--disable-static --disable-gtk-doc  *** [36/215]
----------------------

Has anybody already had this error? Is there something wrong with gtk-doc?


Thanks,
Florian