emerge gnome встревает на gnome2-user-docs

собсно лог.

>>> Unpacking source...
>>> Unpacking gnome-user-docs-2.20.1.tar.bz2 to /var/tmp/portage/gnome-extra/gnome2-user-docs-2.20.1/work
 [32;01m*[0m Fixing OMF Makefiles ...
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/gnome-extra/gnome2-user-docs-2.20.1/work/gnome-user-docs-2.20.1 ...
./configure --prefix=/usr --host=i686-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --disable-scrollkeeper --build=i686-pc-linux-gnu
checking for a BSD-compatible install... /bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for i686-pc-linux-gnu-pkg-config... no
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking whether to enable maintainer-specific portions of Makefiles... no
checking for GNOME2_USER_DOCS... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: creating gnome-user-docs.spec
config.status: creating gnome2-user-guide/Makefile
config.status: creating gnome2-accessibility-guide/Makefile
config.status: creating gnome2-system-admin-guide/Makefile
Making all in gnome2-user-guide
make[1]: Entering directory `/var/tmp/portage/gnome-extra/gnome2-user-docs-2.20.1/work/gnome-user-docs-2.20.1/gnome2-user-guide'
if ! test -d ru/; then mkdir ru/; fi
if [ -f "C/user-guide.xml" ]; then d="../"; else d="/var/tmp/portage/gnome-extra/gnome2-user-docs-2.20.1/work/gnome-user-docs-2.20.1/gnome2-user-guide/"; fi; \
	(cd ru/ && \
	  `which xml2po` -e -p \
	    "${d}ru/ru.po" \
	    "${d}C/user-guide.xml" > user-guide.xml.tmp && \
	    cp user-guide.xml.tmp user-guide.xml && rm -f user-guide.xml.tmp)
Traceback (most recent call last):
  File "/usr/bin/xml2po", line 35, in <module>
    import libxml2
ImportError: No module named libxml2
make[1]: *** [ru/user-guide.xml] Ошибка 1
make[1]: Leaving directory `/var/tmp/portage/gnome-extra/gnome2-user-docs-2.20.1/work/gnome-user-docs-2.20.1/gnome2-user-guide'
make: *** [all-recursive] Ошибка 1

ERROR: gnome-extra/gnome2-user-docs-2.20.1 failed.
Call stack:
       ebuild.sh, line 1701:  Called dyn_compile
       ebuild.sh, line 1039:  Called qa_call 'src_compile'
       ebuild.sh, line   44:  Called src_compile
       ebuild.sh, line 1383:  Called gnome2_src_compile
       gnome2.eclass, line   71:  Called die
The specific snippet of code:
   	emake || die "compile failure"
  The die message:
  compile failure
 
If you need support, post the topmost build error, and the call stack if relevant.
A complete build log is located at '/var/tmp/portage/gnome-extra/gnome2-user-docs-2.20.1/temp/build.log'.