diff --git a/setup/web.sh b/setup/web.sh
index ed37e5e3..d02ed8bd 100755
--- a/setup/web.sh
+++ b/setup/web.sh
@@ -64,12 +64,15 @@ tools/editconf.py /etc/php/7.2/fpm/pool.d/www.conf -c ';' \
 # nginx configuration at /mailinabox-mobileconfig.
 mkdir -p /var/lib/mailinabox
 chmod a+rx /var/lib/mailinabox
+if [[ -n "$LX_ZONE" ]]; then
+  apt_install uuid
+fi
 cat conf/ios-profile.xml \
 	| sed "s/PRIMARY_HOSTNAME/$PRIMARY_HOSTNAME/" \
-	| sed "s/UUID1/$(cat /proc/sys/kernel/random/uuid)/" \
-	| sed "s/UUID2/$(cat /proc/sys/kernel/random/uuid)/" \
-	| sed "s/UUID3/$(cat /proc/sys/kernel/random/uuid)/" \
-	| sed "s/UUID4/$(cat /proc/sys/kernel/random/uuid)/" \
+	| sed "s/UUID1/$(cat /proc/sys/kernel/random/uuid || uuid)/" \
+	| sed "s/UUID2/$(cat /proc/sys/kernel/random/uuid || uuid)/" \
+	| sed "s/UUID3/$(cat /proc/sys/kernel/random/uuid || uuid)/" \
+	| sed "s/UUID4/$(cat /proc/sys/kernel/random/uuid || uuid)/" \
 	 > /var/lib/mailinabox/mobileconfig.xml
 chmod a+r /var/lib/mailinabox/mobileconfig.xml