amd64 system build fails all the time with MAKEVERBOSE=4 in mk.conf...

[Mike <ginger%email.su@localhost>]

Hi list. I've found the strange behavior of current source tree(sources
updated via CVS every 2-3 days, for... ~about 1 last month, but I can't
say exactly when I start getting this error... At least 2 last weeks I'm
getting it, over and over...). build.sh build tools kernel... all 3 ended
OK(sometimes))... but building release/distribution/sets/etc... fails
with strange reason...(small piece of output is at the end of
message))
 I've tried: 'make cleandir, sh build.sh cleandir, nuking tools,obj,destdir... changing many variables in environment( and in mk.conf too), changing /bin/sh to /bin/ksh.. Upgrading to latest binary snapshots, removing all local source tree+ downloading current src/xsrc tarballs(+unpacking it again on the clean partition... with full system rebuild of course....)))
So... Finally I've found this error appears only when compiling with
'MAKEVERBOSE=4 variable specified in mk.conf'... NOTE: I've tried only with
makeverbose 4 and without it at all(I think it should be = 2 by
default)... Without it - everything OK. With it.. everything builds ok,
until trying to "make sets".... Maybe I'm doing something wrong?
Here's the output(almost same with base.tgz and other sets...but I could send full log if needed):

 echo ARCH64=yes
+ echo COMPATARCHDIRS=i386
+ /mnt/OBJECT/amd/tools/bin/nbsed -es/ /,/g
+ /mnt/OBJECT/amd/tools/bin/nbsed -es/ /,/g
+ echo KMODARCHDIRS=amd64-xen
+ echo MKSOLARIS=yes
+ echo x86_64
/mnt/OBJECT/amd/tools/bin/nbawk: non-terminated string echo x86_6... at
source line 70
 context is
                                        wanted["machine_cpu=" "echo
x86_64 >>> 
 <<< 
DEBUG: list_set_files: ./lists/comp/mi
DEBUG: list_set_files: ./lists/comp/md.amd64
DEBUG: list_set_files: ./lists/comp/stl.mi
DEBUG: list_set_files: ./lists/comp/shl.mi
xargs: /mnt/OBJECT/amd/tools/bin/nbsed terminated by SIGPIPE
makeflist output is empty for comp
+ rm -f /mnt/OBJECT/amd/release/amd64/binary/sets/comp.tgz
+ false
+ exit 1
*** [do-comp] Error code 1
nbmake[1]: stopped in /usr/SOURCE/src/distrib/sets
2 errors
nbmake[1]: stopped in /usr/SOURCE/src/distrib/sets
+ exit 2
*** [sets] Error code 2

nbmake: stopped in /usr/SOURCE/src

nbmake: stopped in /usr/SOURCE/src


p.s. thanks for last improvements in msdosfs tools/driver, I'm about
unicode support - It Works perfect for me!)