diff --git a/zenoh-bridge-ros2dds/.deb/postinst b/zenoh-bridge-ros2dds/.deb/postinst
index 51a2be4..7644a10 100644
--- a/zenoh-bridge-ros2dds/.deb/postinst
+++ b/zenoh-bridge-ros2dds/.deb/postinst
@@ -20,7 +20,12 @@ set -e
 
 case "$1" in
     configure)
-        id -u zenoh-bridge-ros2dds  >/dev/null 2>&1 ||  sudo useradd -r -s /bin/false zenoh-bridge-ros2dds
+        if ! command -v systemctl &> /dev/null
+        then
+            echo "WARNING: 'systemctl' not found - cannot install zenoh-bridge-ros2dds as a service."
+            exit 0
+        fi
+        id -u zenoh-bridge-ros2dds &> /dev/null || useradd -r -s /bin/false zenoh-bridge-ros2dds
         systemctl daemon-reload
         systemctl disable zenoh-bridge-ros2dds
     ;;
diff --git a/zenoh-bridge-ros2dds/.deb/postrm b/zenoh-bridge-ros2dds/.deb/postrm
index fcb339b..3ff16df 100644
--- a/zenoh-bridge-ros2dds/.deb/postrm
+++ b/zenoh-bridge-ros2dds/.deb/postrm
@@ -20,7 +20,7 @@ set -e
 
 case "$1" in
     purge|remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
-    userdel zenoh-bridge-ros2dds
+    userdel zenoh-bridge-ros2dds > /dev/null 2>&1 || true
     rm -rf /etc/zenoh-bridge-ros2dds
     ;;