The following error stops compilation of xcb-proto pulled with git today (Mon April 7)

element xcb: Schemas validity error : Element 'xcb', attribute 'extension-oneword': The attribute 'extension-oneword' is not allowed.

The command line is
 PATH=/home/dag/Desktop/prosjekter/xorg/bin/:$PATH ./util/modular/build.sh -d -r xcb/proto /home/dag/Desktop/prosjekter/xorg/

Last lines of output follows

make[3]: Entering directory `/home/dag/Desktop/prosjekter/xorg/src/xcb/proto/xcb-proto-1.1/_build/src'
/usr/bin/xmllint --noout --schema ../../src/xcb.xsd ../../src/*.xml
../../src/bigreq.xml validates
../../src/composite.xml validates
../../src/damage.xml validates
../../src/dpms.xml validates
../../src/glx.xml validates
../../src/randr.xml validates
../../src/record.xml validates
../../src/render.xml validates
../../src/res.xml validates
../../src/screensaver.xml validates
../../src/shape.xml validates
../../src/shm.xml validates
../../src/sync.xml validates
../../src/xc_misc.xml validates
../../src/xevie.xml validates
../../src/xf86dri.xml validates
../../src/xfixes.xml validates
../../src/xinerama.xml validates
../../src/xinput.xml validates
../../src/xprint.xml validates
../../src/xproto.xml validates
../../src/xselinux.xml:26: element xcb: Schemas validity error : Element 'xcb', attribute 'extension-oneword': The attribute 'extension-oneword' is not allowed.
../../src/xselinux.xml fails to validate
../../src/xtest.xml validates
../../src/xvmc.xml validates
../../src/xv.xml validates
make[3]: *** [check-local] Error 3
make[3]: Leaving directory `/home/dag/Desktop/prosjekter/xorg/src/xcb/proto/xcb-proto-1.1/_build/src'
make[2]: *** [check-am] Error 2
make[2]: Leaving directory `/home/dag/Desktop/prosjekter/xorg/src/xcb/proto/xcb-proto-1.1/_build/src'
make[1]: *** [check-recursive] Error 1
make[1]: Leaving directory `/home/dag/Desktop/prosjekter/xorg/src/xcb/proto/xcb-proto-1.1/_build'
make: *** [distcheck] Error 2