diff --git a/setup/bootstrap.sh b/setup/bootstrap.sh
index 6987b9a..19d246c 100644
--- a/setup/bootstrap.sh
+++ b/setup/bootstrap.sh
@@ -7,10 +7,39 @@
 #########################################################
 
 if [ -z "$TAG" ]; then
+	# Make s
 	OS=`lsb_release -d | sed 's/.*:\s*//'`
 	if [ "$OS" == "Debian GNU/Linux 10 (buster)" -o "$(echo $OS | grep -o 'Ubuntu 20.04')" == "Ubuntu 20.04" ]; then
-		TAG=v0.53.POWER.1
+		TAG=v0.53.POWER.0
 	else
+		echo "This script must be run on a system running Debian 10 OR Ubuntu 20.04 LTS."
+		exit 1
+	fi
+fi
+
+# Are we running as root?
+if [[ $EUID -ne 0 ]]; then
+	echo "This script must be run as root. Did you leave out sudo?"
+	exit 1
+fi
+
+# Clone the Mail-in-a-Box repository if it doesn't exist.
+if [ ! -d $HOME/mailinabox ]; then
+	if [ ! -f /usr/bin/git ]; then
+		echo Installing git . . .
+		apt-get -q -q update
+		DEBIAN_FRONTEND=noninteractive apt-get -q -q install -y git < /dev/null
+		echo
+	fi
+
+	echo Downloading Mail-in-a-Box $TAG. . .
+	git clone \
+		-b $TAG --depth 1 \
+		https://github.com/ddavness/power-mailinabox \
+		$HOME/mailinabox \
+		< /dev/null 2> /dev/null
+
+	echo
 fi
 
 # Change directory to it.