diff --git a/setup/preflight.sh b/setup/preflight.sh
index 2105ebec..a4e7b5cf 100644
--- a/setup/preflight.sh
+++ b/setup/preflight.sh
@@ -8,11 +8,13 @@ if [[ $EUID -ne 0 ]]; then
 	exit 1
 fi
 
-# Check that we are running on Ubuntu 20.04 LTS (or 20.04.xx).
-if [ "$( lsb_release --id --short )" != "Ubuntu" ] || [ "$( lsb_release --release --short )" != "22.04" ]; then
+. /etc/os-release
+
+# Check that we are running on Ubuntu 22.04 LTS (or 22.04.xx).
+if [ "${ID:-}" != "ubuntu" ] || [ "${VERSION_ID:-}" != "22.04" ]; then
 	echo "Mail-in-a-Box only supports being installed on Ubuntu 22.04, sorry. You are running:"
 	echo
-	lsb_release --description --short
+	echo "${ID:-"Unknown linux distribution"} ${VERSION_ID:-}"
 	echo
 	echo "We can't write scripts that run on every possible setup, sorry."
 	exit 1