diff --git a/hosts/Alaska/modules/backup_script.nix b/hosts/Alaska/modules/backup_script.nix
index 83caeeb..6fb1dae 100644
--- a/hosts/Alaska/modules/backup_script.nix
+++ b/hosts/Alaska/modules/backup_script.nix
@@ -125,7 +125,7 @@ in
           nextcloud-occ maintenance:mode --off
 
           echo "Unmounting the external drive"
-          umount ${cfg.tmp_mount_point}
+          umount ${builtins.toString cfg.tmp_mount_point}
 
           echo "Job completed"
           # "