diff --git a/pacman-zbm-syslinux-regen.sh b/pacman-zbm-syslinux-regen.sh
index d59aafa..0b91447 100644
--- a/pacman-zbm-syslinux-regen.sh
+++ b/pacman-zbm-syslinux-regen.sh
@@ -15,12 +15,15 @@ if [[ "$(<<<"${boot_fs}" wc -l)" -gt '1' ]]; then
     exit 1
 fi
 
-boot_disk="$(lsblk --output 'NAME' --json --tree | jq --raw-output '.[][] | select(.children | length > 0) | select(.children[].name=="'"${boot_fs}"'") | .name')"
+boot_fs_name="$(basename "${boot_fs}")"
+boot_disk="$(lsblk --output 'NAME' --json --tree | jq --raw-output '.[][] | select(.children | length > 0) | select(.children[].name=="'"${boot_fs_name}"'") | .name')"
 if [[ ! "${boot_disk}" ]]; then
     # There's no parent drive over "${boot_fs}" meaning "${boot_fs}" itself
     # already is the parent. This is a file system on a drive and not on a
     # partition.
     boot_disk="${boot_fs}"
+else
+    boot_disk='/dev/'"${boot_disk}"
 fi
 
 find "${boot_dir}" -type f -iname '*.c32' -delete