simplify script

flake.nix

@@ -138,6 +138,7 @@
       serviceMountDeps = serviceName: dirs: pkgs: {
         systemd.services."${serviceName}_mounts" =
           let
+            lib = nixpkgs.lib;
             zfslistmounted = pkgs.writeShellApplication {
               name = "zfslistmounted";
               runtimeInputs = with pkgs; [
@@ -146,16 +147,11 @@
                 gawk
                 coreutils
               ];
-              text =
-                let
-                  lib = nixpkgs.lib;
-                in
-                ''
-                  #!/bin/sh
-                  zfs get mounted | grep yes | awk '{print $1}' | while read -r i; do zfs get mountpoint "$i" | awk 'FNR==2 {print $3}'; done | grep -c '${lib.strings.concatStringsSep "\|" dirs}' | grep -Fq ${toString (lib.length dirs)}
-                '';
+              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)}
+              '';
             };
-
           in
           {
             unitConfig.Wants = "zfs.target";