не собирается libxcb

dolphin ~ # emerge -uND world
Calculating dependencies... done!

>>> Verifying ebuild manifests

>>> Starting parallel fetch

>>> Emerging (1 of 194) x11-libs/libxcb-1.7
 * libxcb-1.7.tar.bz2 RMD160 SHA1 SHA256 size ;-) ...                                                                                                [ ok ]
 * checking ebuild checksums ;-) ...                                                                                                                 [ ok ]
 * checking auxfile checksums ;-) ...                                                                                                                [ ok ]
 * checking miscfile checksums ;-) ...                                                                                                               [ ok ]
 * CPV:  x11-libs/libxcb-1.7
 * REPO: gentoo
 * USE:  build elibc_glibc kernel_linux userland_GNU x86

....

ImportError: /usr/lib/python2.6/lib-dynload/_elementtree.so: undefined symbol: PyUnicodeUCS2_Decode
make[1]: *** [xc_misc.c] Error 1
make[1]: *** [bigreq.c] Error 1
make[1]: Leaving directory `/var/tmp/portage/x11-libs/libxcb-1.7/work/libxcb-1.7/src'
make: *** [all-recursive] Error 1
 * ERROR: x11-libs/libxcb-1.7 failed:
 *   died running emake, base_src_make
 * 
 * Call stack:
 *     ebuild.sh, line   54:  Called src_compile
 *   environment, line 5457:  Called xorg-2_src_compile
 *   environment, line 6254:  Called base_src_compile
 *   environment, line 1141:  Called base_src_make
 *   environment, line 1179:  Called die
 * The specific snippet of code:
 *           emake "$@" || die "died running emake, $FUNCNAME";
 * 
 * If you need support, post the output of 'emerge --info =x11-libs/libxcb-1.7',
 * the complete build log and the output of 'emerge -pqv =x11-libs/libxcb-1.7'.
 * The complete build log is located at '/var/tmp/portage/x11-libs/libxcb-1.7/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/x11-libs/libxcb-1.7/temp/environment'.
 * S: '/var/tmp/portage/x11-libs/libxcb-1.7/work/libxcb-1.7'

второй день с этим долбаюсь мож кто подскажет