Today's sources. I'd gotten this same error a while ago; is it something I'm
doing? Running the offending nbzic command outside of the makefile's context
seems to work okay..

install ===> share/zoneinfo
/tree/tooldir/bin/nbzic -y "sh /tree/src/share/zoneinfo/yearistype.sh" -d
/tree/
dest/usr/share/zoneinfo -L /dev/null africa antarctica asia australasia
europe 
northamerica southamerica pacificnew etcetera factory  backward systemv
solar87 
solar88 solar89
*** Error code 1

my mk.conf:

USE_NEW_TOOLCHAIN=yes
USETOOLS=yes
MKTOOLS=yes
USE_XF86_4=yes
TOOLDIR=/tree/tooldir
RELEASEDIR=/tree/release
DESTDIR=/tree/dest
BSDSRCDIR=/tree/src
BSDOBJDIR=/tree/obj

my build script:

#!/bin/sh

set echo

cd /tree

rm -rf dest/*
rm -rf obj/*
rm -rf tooldir/*
rm -rf release/*

find /tree -type f -name '\.depend' | xargs rm -f

cd src

cvs -q update -PdA | tee update.log

/usr/bin/time make USE_NEW_TOOLCHAIN=yes USETOOLS=yes MKTOOLS=yes
TOOLDIR=/tree/tooldir DESTDIR=/tree/dest BSDSRCDIR=/tree/src
BSDOBJDIR=/tree/obj MKOBJ=yes MKOBJDIRS=yes build | tee build.log

-- 
George Coulouris -- firstname at lastname dot org