diff --git a/system_setup/install.sh b/system_setup/install.sh
index df3b9a8..658a156 100755
--- a/system_setup/install.sh
+++ b/system_setup/install.sh
@@ -98,7 +98,7 @@ collect_partitions() {
         [[ "$LABEL"  == "$OEMDRV_LABEL"                ]] && continue
         [[ -z "$PKNAME"                                ]] && continue
 
-        local disk="/dev/$PKNAME"
+        local disk="/dev/${PKNAME##*/}"
         local pnum
         pnum=$(cat /sys/class/block/"${NAME##/dev/}"/partition 2>/dev/null) || continue