diff --git a/contrib/ldns/freebsd-configure.sh b/contrib/ldns/freebsd-configure.sh
index 588995448f37..c392967e7bb6 100755
--- a/contrib/ldns/freebsd-configure.sh
+++ b/contrib/ldns/freebsd-configure.sh
@@ -5,15 +5,26 @@
 
 set -e
 
+error() {
+	echo "$@" >&2
+	exit 1
+}
+
 ldns=$(dirname $(realpath $0))
 cd $ldns
 
-libtoolize --copy
-autoheader
-autoconf
+# Run autotools before we drop LOCALBASE out of PATH
+(cd $ldns && libtoolize --copy && autoheader && autoconf)
+(cd $ldns/drill && aclocal && autoheader && autoconf)
+
+# Ensure we use the correct toolchain and clean our environment
+export CC=$(echo ".include <bsd.lib.mk>" | make -f /dev/stdin -VCC)
+export CPP=$(echo ".include <bsd.lib.mk>" | make -f /dev/stdin -VCPP)
+unset CFLAGS CPPFLAGS LDFLAGS LD_LIBRARY_PATH LIBS
+export PATH=/bin:/sbin:/usr/bin:/usr/sbin
+
+cd $ldns
 ./configure --prefix= --exec-prefix=/usr --disable-dane-ta-usage
 
 cd $ldns/drill
-autoheader
-autoconf
 ./configure --prefix= --exec-prefix=/usr
diff --git a/contrib/unbound/freebsd-configure.sh b/contrib/unbound/freebsd-configure.sh
index 5d930a60317d..7169bbcce732 100755
--- a/contrib/unbound/freebsd-configure.sh
+++ b/contrib/unbound/freebsd-configure.sh
@@ -13,6 +13,15 @@ error() {
 unbound=$(dirname $(realpath $0))
 cd $unbound
 
+# Run autotools before we drop LOCALBASE out of PATH
+(cd $unbound && libtoolize --copy && autoheader && autoconf)
+
+# Ensure we use the correct toolchain and clean our environment
+export CC=$(echo ".include <bsd.lib.mk>" | make -f /dev/stdin -VCC)
+export CPP=$(echo ".include <bsd.lib.mk>" | make -f /dev/stdin -VCPP)
+unset CFLAGS CPPFLAGS LDFLAGS LD_LIBRARY_PATH LIBS
+export PATH=/bin:/sbin:/usr/bin:/usr/sbin
+
 ldnssrc=$(realpath $unbound/../ldns)
 [ -f $ldnssrc/ldns/ldns.h ] || error "can't find LDNS sources"
 export CFLAGS="-I$ldnssrc"
@@ -24,17 +33,9 @@ ldnsobj=$(realpath $(make -C$ldnsbld -V.OBJDIR))
 [ -f $ldnsobj/libprivateldns.a ] || error "can't find LDNS object directory"
 export LDFLAGS="-L$ldnsobj"
 
-export CC=$(echo ".include <bsd.lib.mk>" | make -f /dev/stdin -VCC)
-export CPP=$(echo ".include <bsd.lib.mk>" | make -f /dev/stdin -VCPP)
-
-autoconf
-autoheader
+cd $unbound
 ./configure \
 	--prefix= --exec-prefix=/usr \
 	--with-conf-file=/var/unbound/unbound.conf \
 	--with-run-dir=/var/unbound \
 	--with-username=unbound
-
-# Don't try to provide bogus memory usage statistics based on sbrk(2).
-sed -n -i.orig -e '/HAVE_SBRK/!p' config.status
-./config.status config.h
diff --git a/crypto/openssh/freebsd-configure.sh b/crypto/openssh/freebsd-configure.sh
index d2c63e170ffe..fbc0f5139c88 100755
--- a/crypto/openssh/freebsd-configure.sh
+++ b/crypto/openssh/freebsd-configure.sh
@@ -16,28 +16,27 @@ configure_args="
 
 set -e
 
-# make sure configure uses the correct compiler
+openssh=$(dirname $(realpath $0))
+cd $openssh
+
+# Run autotools before we drop LOCALBASE out of PATH
+(cd $openssh && libtoolize --copy && autoheader && autoconf)
+
+# Ensure we use the correct toolchain and clean our environment
 export CC=$(echo ".include <bsd.lib.mk>" | make -f /dev/stdin -VCC)
 export CPP=$(echo ".include <bsd.lib.mk>" | make -f /dev/stdin -VCPP)
-unset CFLAGS CPPFLAGS LDFLAGS LIBS
-
-# regenerate configure and config.h.in
-autoheader
-autoconf
-
-# reset PATH to avoid picking up the wrong libraries
+unset CFLAGS CPPFLAGS LDFLAGS LD_LIBRARY_PATH LIBS
 export PATH=/bin:/sbin:/usr/bin:/usr/sbin
-unset LD_LIBRARY_PATH
 
-# generate config.h with krb5 and stash it
+# Generate config.h with krb5 and stash it
 sh configure $configure_args --with-kerberos5=/usr
 mv config.log config.log.orig
 mv config.h config.h.orig
 
-# generate config.h without krb5
+# Generate config.h without krb5
 sh configure $configure_args --without-kerberos5
 
-# extract the difference
+# Extract the difference
 echo '/* $Free''BSD$ */' > krb5_config.h
 diff -u config.h.orig config.h |
 	sed -n '/^-#define/s/^-//p' |