diff --git a/hosts/nixos-laptop/default.nix b/hosts/nixos-laptop/default.nix
index 71b149a..5e383ab 100644
--- a/hosts/nixos-laptop/default.nix
+++ b/hosts/nixos-laptop/default.nix
@@ -29,7 +29,7 @@
         name = "zfs-diff";
         runtimeInputs = with pkgs; [ zfs coreutils parallel tree ];
         text = ''
-          sudo zfs diff zroot/encrypted/root@blank | cut -f2 | parallel 'test -e /persist/{} || echo {}' | tree --fromfile .
+          zfs diff -F zroot/encrypted/root@blank | awk '$2 == "F" && system("test -e /persist/"$3) != 0 { print $3 }' 2>/dev/null | tree --fromfile . "$@"
         '';
       }
     )