# and target machines.
sh make-config.sh || exit 1
+# Make a unique ID for this build (to discourage people from
+# mismatching sbcl and *.core files).
+echo '"'`hostname -s`-`whoami`-`date +%F-%H-%M-%S`'"' > output/build-id.tmp
+
# The make-host-*.sh scripts are run on the cross-compilation host,
# and the make-target-*.sh scripts are run on the target machine. In
# ordinary compilation, we just do these phases consecutively on the