diff --git a/export-image/prerun.sh b/export-image/prerun.sh
index 7345792..7e0d1eb 100755
--- a/export-image/prerun.sh
+++ b/export-image/prerun.sh
@@ -37,16 +37,12 @@ p
 w
 EOF
 
-PARTED_OUT=$(parted -s "${IMG_FILE}" unit b print)
-BOOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^ 1'| xargs echo -n \
-| cut -d" " -f 2 | tr -d B)
-BOOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^ 1'| xargs echo -n \
-| cut -d" " -f 4 | tr -d B)
+PARTED_OUT=$(parted -sm "${IMG_FILE}" unit b print)
+BOOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^1:' | cut -d':' -f 2 | tr -d B)
+BOOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^1:' | cut -d':' -f 4 | tr -d B)
 
-ROOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^ 2'| xargs echo -n \
-| cut -d" " -f 2 | tr -d B)
-ROOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^ 2'| xargs echo -n \
-| cut -d" " -f 4 | tr -d B)
+ROOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^2:' | cut -d':' -f 2 | tr -d B)
+ROOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^2:' | cut -d':' -f 4 | tr -d B)
 
 BOOT_DEV=$(losetup --show -f -o "${BOOT_OFFSET}" --sizelimit "${BOOT_LENGTH}" "${IMG_FILE}")
 ROOT_DEV=$(losetup --show -f -o "${ROOT_OFFSET}" --sizelimit "${ROOT_LENGTH}" "${IMG_FILE}")
diff --git a/export-noobs/prerun.sh b/export-noobs/prerun.sh
index b4b56b2..54e0c59 100755
--- a/export-noobs/prerun.sh
+++ b/export-noobs/prerun.sh
@@ -9,16 +9,12 @@ cp "${WORK_DIR}/export-image/${IMG_FILENAME}${IMG_SUFFIX}.img" "${STAGE_WORK_DIR
 
 rm -rf "${NOOBS_DIR}"
 
-PARTED_OUT=$(parted -s "${IMG_FILE}" unit b print)
-BOOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^ 1'| xargs echo -n \
-| cut -d" " -f 2 | tr -d B)
-BOOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^ 1'| xargs echo -n \
-| cut -d" " -f 4 | tr -d B)
+PARTED_OUT=$(parted -sm "${IMG_FILE}" unit b print)
+BOOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^1:' | cut -d':' -f 2 | tr -d B)
+BOOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^1:' | cut -d':' -f 4 | tr -d B)
 
-ROOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^ 2'| xargs echo -n \
-| cut -d" " -f 2 | tr -d B)
-ROOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^ 2'| xargs echo -n \
-| cut -d" " -f 4 | tr -d B)
+ROOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^2:' | cut -d':' -f 2 | tr -d B)
+ROOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^2:' | cut -d':' -f 4 | tr -d B)
 
 BOOT_DEV=$(losetup --show -f -o "${BOOT_OFFSET}" --sizelimit "${BOOT_LENGTH}" "${IMG_FILE}")
 ROOT_DEV=$(losetup --show -f -o "${ROOT_OFFSET}" --sizelimit "${ROOT_LENGTH}" "${IMG_FILE}")