>>> host-autoconf 2.72 Extracting
xzcat /home/autobuild/autobuild/instance-23/dl/autoconf/autoconf-2.72.tar.xz | tar --strip-components=1 -C /home/autobuild/autobuild/instance-23/output-1/build/host-autoconf-2.72   -xf -
>>> host-autoconf 2.72 Patching

Applying 0001-dont-add-dirty-to-version.patch using patch: 
patching file build-aux/git-version-gen
>>> host-autoconf 2.72 Updating config.sub and config.guess
for file in config.guess config.sub; do for i in $(find /home/autobuild/autobuild/instance-23/output-1/build/host-autoconf-2.72 -name $file); do cp support/gnuconfig/$file $i; done; done
>>> host-autoconf 2.72 Patching libtool
make: which: No such file or directory
which: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
/bin/sh: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
make: *** [package/pkg-generic.mk:269: /home/autobuild/autobuild/instance-23/output-1/build/host-autoconf-2.72/.stamp_configured] Error 127
make: Leaving directory '/home/autobuild/autobuild/instance-23/buildroot'