diff --git a/flake.nix b/flake.nix
index 1a2a68f..c57b406 100644
--- a/flake.nix
+++ b/flake.nix
@@ -149,7 +149,7 @@
               ];
               text = ''
                 #!/bin/sh
-                zfs list -o mountpoint,mounted | awk 'FNR > 1 && $2 == "yes" {print $1}' | grep -c '${lib.strings.concatStringsSep "\|" dirs}' | grep -Fq ${toString (lib.length dirs)}
+                zfs list -o mountpoint,mounted -H | awk '$2 == "yes" {print $1}' | grep -c '${lib.strings.concatStringsSep "\|" dirs}' | grep -Fq ${toString (lib.length dirs)}
               '';
             };
           in