diff --git a/tools/boot/lua-img.sh b/tools/boot/lua-img.sh
new file mode 100644
index 000000000000..5e9cc8d446c5
--- /dev/null
+++ b/tools/boot/lua-img.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+# $FreeBSD$
+
+# Quick script to build a suitable /boot dir somewhere in the tree for testing.
+
+die() {
+    echo $*
+    exit 1
+}
+
+dir=$1
+cd $(make -V SRCTOP)
+
+[ -n "$dir" ] || die "No directory specified"
+
+set -e
+
+rm -rf ${dir}
+mkdir -p ${dir}
+mtree -deUW -f etc/mtree/BSD.root.dist -p ${dir}
+mtree -deUW -f etc/mtree/BSD.usr.dist -p ${dir}/usr
+cd stand
+make install DESTDIR=${dir} NO_ROOT=t MK_LOADER_LUA=yes MK_FORTH=no MK_INSTALL_AS_USER=yes
+mkdir -p ${dir}/boot/kernel
+cp /boot/kernel/kernel ${dir}/boot/kernel