error while building tools

[Riccardo Mottola <riccardo.mottola%libero.it@localhost>]

Hi,
while building today with the command:

 ./build.sh -O ../obj -T ../tools -U distribution


I get the attached error. Any clues? Thanks, Riccardo

<...>
./stand/i386/5.99.56/modules/zfs/zfs.kmod
./stand/i386/5.99.56/modules/zl10353
./stand/i386/5.99.56/modules/zl10353/zl10353.kmod
=========  end of 294 extra files  ===========


*** Failed target:  checkflist
*** Failed command: cd /usr/src/distrib/sets && 
DESTDIR=/usr/src/../obj/destdiri386 MACHINE=i386 MACHINE_ARCH=i386 
AWK=/usr/src/../tools/bin/nbawk CKSUM=/usr/rc/../tools/bin/nbcksum 
DB=/usr/src/../tools/bin/nbdb HOST_SH=/bin/sh 
MAKE=/usrsrc/../tools/bin/nbmake MKTEMP=/usr/src/../tools/bin/nbmktemp 
MTREE=/usr/src/..tools/bin/nbmtree PAX=/usr/src/../tools/bin/nbpax 
COMPRESS_PROGRAM=gzip PKG_CRETE=/usr/src/../tools/bin/nbpkg_create 
SED=/usr/src/../tools/bin/nbsed TSORT=/us/src/../tools/bin/nbtsort\ -q 
/bin/sh /usr/src/distrib/sets/checkflist -L base M 
/usr/src/../obj/destdir.i386/METALOG.sanitised
*** Error code 1

Stop.
nbmake: stopped in /usr/src/distrib/sets

*** Failed target:  distribution
*** Failed command: _makedirtarget() { dir="$1"; shift; target="$1"; 
shift; cas "${dir}" in /*) this="${dir}/"; real="${dir}" ;; .) this=""; 
real="/usr/src" ; *) this="${dir}/"; real="/usr/src/${dir}" ;; esac; 
show=${this:-.}; echo "${taget} ===> ${show%/}${1:+ (with: $@)}"; cd 
"${real}" && /usr/src/../tools/bin/nbake _THISDIR_="${this}" "$@" 
${target}; }; _makedirtarget distrib/sets checkflit
*** Error code 1

Stop.
nbmake: stopped in /usr/src

ERROR: Failed to make distribution
*** BUILD ABORTED ***