Problemas DRBD

Estou tendo problemas com o DRBD.
Qnd tendo instalar o drbd dá a seguinte mensagem de erro:

rm -rf .tmp_versions
rm -f *.[oas] *.ko .*.cmd .*.d .*.tmp *.mod.c .*.flags .depend .kernel*

Calling toplevel makefile of kernel source tree, which I believe is in
KDIR=/lib/modules/2.6.24-3-kanotix/build

test -f ../scripts/adjust_drbd_config_h.sh && \
KDIR=/lib/modules/2.6.24-3-kanotix/build /bin/sh ../scripts/adjust_drbd_config_h.sh

Using unmodified drbd_config.h

make -C /lib/modules/2.6.24-3-kanotix/build SUBDIRS=/usr/src/modules/drbd/drbd modules
make[1]: Entering directory `/usr/src/linux-headers-2.6.24-3-kanotix'
scripts/Makefile.build:46: *** CFLAGS was changed in "/usr/src/modules/drbd/drbd/Makefile". Fix it to use EXTRA_CFLAGS. Stop.
make[1]: *** [_module_/usr/src/modules/drbd/drbd] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.24-3-kanotix'
make: *** [kbuild] Error 2


Oq fazer ???