There was an update of pax on Fri Sep 16 16:48:18 UTC 2005.
Maybe you missed this one? 
I am not familiar with time difference between UTC and MEST. 


On Fri, 16 Sep 2005 20:11:48 +0200
Kurt Schreiner <ks@ub.uni-mainz.de> wrote:

> Hi,
> 
> just cvs update'd -current sources, build was successfull, but trying to
> install gives:
> 
> >-129: sudo sh NBscripts/build-netbsd -i
> ===> build.sh command: ./build.sh -N 1 -u -U -m i386 -O /u/NetBSD/arch/i386/obj -D /u/NetBSD/arch/i386/dest -T /u/NetBSD/arch/i386/TOOLS install=/
> ===> build.sh started: Fri Sep 16 20:05:59 MEST 2005
> ===> MACHINE:          i386
> ===> MACHINE_ARCH:     i386
> ===> TOOLDIR path:     /u/NetBSD/arch/i386/TOOLS
> ===> DESTDIR path:     /u/NetBSD/arch/i386/dest
> ===> RELEASEDIR path:  /u/NetBSD/arch/i386/obj/releasedir
> ===> makewrapper:      /u/NetBSD/arch/i386/TOOLS/bin/nbmake-i386
> ===> Updated /u/NetBSD/arch/i386/TOOLS/bin/nbmake-i386
> installsets ===> distrib/sets   (with: INSTALLDIR=/ INSTALLSETS=)
> Copying set base
> pax: Cannot create directory `/' (Is a directory)
> Copying set comp
> pax: Cannot create directory `/' (Is a directory)
> Copying set games
> pax: Cannot create directory `/' (Is a directory)
> Copying set man
> pax: Cannot create directory `/' (Is a directory)
> Copying set misc
> pax: Cannot create directory `/' (Is a directory)
> Copying set text
> pax: Cannot create directory `/' (Is a directory)
> Copying set xbase
> pax: Cannot create directory `/' (Is a directory)
> Copying set xcomp
> pax: Cannot create directory `/' (Is a directory)
> Copying set xfont
> pax: Cannot create directory `/' (Is a directory)
> Copying set xserver
> pax: Cannot create directory `/' (Is a directory)
> 
> *** Failed target:  installsets
> *** Failed command: cd /u/NetBSD/src/distrib/sets && DESTDIR=/u/NetBSD/arch/i386/dest MACHINE=i386 MACHINE_ARCH=i386 CKSUM=/u/NetBSD/arch/i386/TOOLS/bin/nbcksum MAKE=/u/NetBSD/arch/i386/TOOLS/bin/nbmake MTREE=/u/NetBSD/arch/i386/TOOLS/bin/nbmtree MKTEMP=/u/NetBSD/arch/i386/TOOLS/bin/nbmktemp PAX=/u/NetBSD/arch/i386/TOOLS/bin/nbpax HOST_SH=sh sh ./maketars -d /u/NetBSD/arch/i386/dest -M /u/NetBSD/arch/i386/dest/METALOG -N /u/NetBSD/src/etc -b -i / 
> *** Error code 10
> 
> Stop.
> nbmake: stopped in /u/NetBSD/src/distrib/sets
> 
> *** Failed target:  installworld
> *** Failed command: _makedirtarget() { dir="$1"; shift; target="$1"; shift; case "${dir}" in /*) this="${dir}/"; real="${dir}" ;; .) this=""; real="/u/NetBSD/src" ;; *) this="${dir}/"; real="/u/NetBSD/src/${dir}" ;; esac; show=${this:-.}; echo "${target} ===> ${show%/}${1:+ (with: $@)}"; cd "${real}" && /u/NetBSD/arch/i386/TOOLS/bin/nbmake _THISDIR_="${this}" "$@" ${target}; }; _makedirtarget distrib/sets installsets INSTALLDIR=/ INSTALLSETS=
> *** Error code 1
> 
> Stop.
> nbmake: stopped in /u/NetBSD/src
> 
> ERROR: Failed to make installworld to /
> *** BUILD ABORTED ***
> 
> 
> Seems to be caused by the recent changes to pax ....
> 
> Kurt