Partially Override Timer Unit Configured by `services.zfs.trim`

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1

I would like to add RandomizedDelaySec = "7day"; FixedRandomizedDelay = "yes"; to the configuration of the zfs-trim.timer unit that is automatically produced by services.zfs.trim.enabled = true;. Here is what I have tried:

With this one, there was no evidence of my values:

  services.zfs.trim = {
    # I know these are default values,
    # just putting them here for illustration
    enable = true;
    interval = "weekly";
  };
  systemd.timers."zfs-trim" = {
    timerConfig = {
      RandomizedDelaySec =  "7day";
      FixedRandomizedDelay = "yes";
    };
  };

With this one, the nixos-rebuild command hangs for a while and then gives up with stack overflow/possible infinite recursion:

  services.zfs.trim = {
    enable = true;
    interval = "weekly";
  };
  systemd.timers."zfs-trim" = lib.mkOverride {
    timerConfig = {
      RandomizedDelaySec =  "7day";
      FixedRandomizedDelay = "yes";
    };
  };

With this one I get the error error: anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/types.nix:721:33 called with unexpected argument 'priority' and with --show-trace, a huge stack trace that I have no idea how to interpret.

  services.zfs.trim = {
    enable = true;
    interval = "weekly";
  };
  systemd.timers."zfs-trim" = lib.mkAfter {
    timerConfig = {
      RandomizedDelaySec =  "7day";
      FixedRandomizedDelay = "yes";
    };
  };

What is the right way to achieve what I seek here?

Thanks!

2

The timer seems to be called zpool-trim, not zfs-trim.

3

:man_facepalming: and that’s why I shouldn’t be trying to administer a system that late at night. Thanks!