diff --git a/misc/packaging/acrn-hypervisor.postinst b/misc/packaging/acrn-hypervisor.postinst
index d61f0908e..73c29927d 100644
--- a/misc/packaging/acrn-hypervisor.postinst
+++ b/misc/packaging/acrn-hypervisor.postinst
@@ -21,7 +21,7 @@ GENERATED_PARAMS=(cpu_perf_policy=Performance)
 #ACRN parameters End
 
 ACRNBIN="/boot/acrn.${SCENARIO}.${BOARD}.bin"
-type=$(lsblk -l |awk '$NF == "/" {print $1}')
+type=$(findmnt / |awk '$1 == "/" {print $2}')
 
 pattern='^/dev/.* UUID="([^"]+)".* PARTUUID="([^"]+)"'
 while IFS= read -r line; do
@@ -29,7 +29,7 @@ while IFS= read -r line; do
         uuid="${BASH_REMATCH[1]}"
         partuuid="${BASH_REMATCH[2]}"
     fi
-done < <(blkid |grep ext4 |grep ${type})
+done < <(blkid |grep ${type})
 
 filename="/etc/grub.d/40_custom"
 
diff --git a/misc/packaging/acrn-kernel.postinst b/misc/packaging/acrn-kernel.postinst
index 1704c254e..23e024b66 100644
--- a/misc/packaging/acrn-kernel.postinst
+++ b/misc/packaging/acrn-kernel.postinst
@@ -3,7 +3,7 @@
 # postinst script for acrn kernel
 filename="/etc/grub.d/40_custom"
 menu=$(grep ACRN_deb_multiboot2 ${filename}) || true
-type=$(lsblk -l |awk '$NF == "/" {print $1}')
+type=$(findmnt / |awk '$1 == "/" {print $2}')
 str=$(blkid |grep ${type})
 uuid=$(echo $str |cut -d " " -f 2|cut -d "=" -f 2)
 str=$(blkid |grep ${type})