diff --git a/Makefile.inc1 b/Makefile.inc1
index f85f0326da2..9223123b1e1 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -2240,9 +2240,13 @@ ${_bt}-usr.bin/mandoc: ${_bt}-lib/libopenbsd
 _basic_bootstrap_tools_multilink=usr.bin/grep grep,egrep,fgrep
 _basic_bootstrap_tools_multilink+=bin/test test,[
 # bootstrap tools needed by buildworld:
-_basic_bootstrap_tools=usr.bin/awk usr.bin/cut bin/expr usr.bin/gencat \
+_basic_bootstrap_tools=usr.bin/cut bin/expr usr.bin/gencat \
     usr.bin/join usr.bin/mktemp bin/rmdir usr.bin/sed usr.bin/sort \
     usr.bin/truncate usr.bin/tsort
+# Some build scripts use nawk instead of awk (this happens at least in
+# cddl/contrib/opensolaris/lib/libdtrace/common/mknames.sh) so we need both awk
+# and nawk in ${WORLDTMP}/legacy/bin.
+_basic_bootstrap_tools_multilink+=usr.bin/awk awk,nawk
 # file2c is required for building usr.sbin/config:
 _basic_bootstrap_tools+=usr.bin/file2c
 # uuencode/uudecode required for share/tabset
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/mkerrno.sh b/cddl/contrib/opensolaris/lib/libdtrace/common/mkerrno.sh
index 50b7f1c1b90..c9fb9e04fe0 100755
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/mkerrno.sh
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/mkerrno.sh
@@ -25,6 +25,7 @@
 # Use is subject to license terms.
 #
 #ident	"%Z%%M%	%I%	%E% SMI"
+set -e
 
 echo "\
 /*\n\
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/mkerrtags.sh b/cddl/contrib/opensolaris/lib/libdtrace/common/mkerrtags.sh
index d5651ff727f..cc3ef3cc961 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/mkerrtags.sh
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/mkerrtags.sh
@@ -25,6 +25,7 @@
 # Use is subject to license terms.
 #
 #ident	"%Z%%M%	%I%	%E% SMI"
+set -e
 
 BSDECHO=-e
 
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/mknames.sh b/cddl/contrib/opensolaris/lib/libdtrace/common/mknames.sh
index 2fdc2fa636d..5bb47cb1781 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/mknames.sh
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/mknames.sh
@@ -25,6 +25,7 @@
 # Use is subject to license terms.
 #
 #ident	"%Z%%M%	%I%	%E% SMI"
+set -e
 
 BSDECHO=-e
 
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/mksignal.sh b/cddl/contrib/opensolaris/lib/libdtrace/common/mksignal.sh
index 1bffa6468c2..dce06a0e179 100755
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/mksignal.sh
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/mksignal.sh
@@ -25,6 +25,7 @@
 # Use is subject to license terms.
 #
 #ident	"%Z%%M%	%I%	%E% SMI"
+set -e
 
 echo "\
 /*\n\