diff --git a/overlays/show-files-to-be-deleted/default.nix b/overlays/show-files-to-be-deleted/default.nix
index 7f70a0c..a461e36 100644
--- a/overlays/show-files-to-be-deleted/default.nix
+++ b/overlays/show-files-to-be-deleted/default.nix
@@ -3,8 +3,14 @@
   flake.overlays.show-files-to-be-deleted =
     final: prev: {
       show-files-to-be-deleted = final.writeShellScriptBin "show-files-to-be-deleted" ''
-        [ $(id -u) == 0 ] || exec sudo $0
-        find / -mount -type f
+        if [[ "$#" != "1" ]] ; then
+          echo "Invalid number ($#) of argumets, one expected."
+          exit 1
+        fi
+
+        _mount_point="$1"
+
+        find "$1" -mount -type f
       '';
     };
 }