diff --git a/build/docker/debian-ncp/run-parts.sh b/build/docker/debian-ncp/run-parts.sh
index bc6d9ac1..2a058890 100755
--- a/build/docker/debian-ncp/run-parts.sh
+++ b/build/docker/debian-ncp/run-parts.sh
@@ -18,11 +18,11 @@ then
   cp -raT /data-ro /data
 fi
 
-CURRENT_NC_VERSION="$(sudo -u www-data php -r "include(\"/var/www/nextcloud/config/config.php\"); echo(\$CONFIG[\"version\"]);")"
+CURRENT_NC_VERSION="$(sudo -u www-data php -r "include(\"/data/nextcloud/config/config.php\"); echo(\$CONFIG[\"version\"]);")"
 CURRENT_NC_MAJ="${CURRENT_NC_VERSION%%.*}"
 [[ "$CURRENT_NC_MAJ" -ge "$MINIMUM_NC_VERSION" ]] || {
   echo "This image of NCP requires at least Nextcloud version ${MINIMUM_NC_VERSION} but you have ${CURRENT_NC_VERSION} installed. " \
-    "Please upgrade your Nextcloud first (using the web UI), before upgrading to this NCP version."
+    "Please upgrade your Nextcloud first (using the web UI on an older NCP image), before upgrading to this NCP version."
   exit 1
 }