diff --git a/nixos/modules/tasks/filesystems/zfs.nix b/nixos/modules/tasks/filesystems/zfs.nix
index 6cfa510a78a..c8ba2cac0c1 100644
--- a/nixos/modules/tasks/filesystems/zfs.nix
+++ b/nixos/modules/tasks/filesystems/zfs.nix
@@ -558,9 +558,7 @@ in
         after = [ "zfs-import.target" ];
         path = [ packages.zfsUser ];
         startAt = cfgTrim.interval;
-        script = ''
-          zpool list -H -o name | xargs --no-run-if-empty -n1 zpool trim
-        '';
+        serviceConfig.ExecStart = "${pkgs.runtimeShell} -c 'zpool list -H -o name | xargs --no-run-if-empty -n1 zpool trim'";
       };
     })
   ];