machine_setup/nix/configuration/roles/zfs/default.nix

{
  config,
  lib,
  pkgs,
  ...
}:

let
  zfs_clone_send =
    (pkgs.writeScriptBin "zfs_clone_send" (builtins.readFile ./files/zfs_clone_send.bash)).overrideAttrs
      (old: {
        buildCommand = "${old.buildCommand}\n patchShebangs $out";

      });
  zfs_clone_recv =
    (pkgs.writeScriptBin "zfs_clone_recv" (builtins.readFile ./files/zfs_clone_recv.bash)).overrideAttrs
      (old: {
        buildCommand = "${old.buildCommand}\n patchShebangs $out";

      });
  zfs_clone_resume =
    (pkgs.writeScriptBin "zfs_clone_resume" (builtins.readFile ./files/zfs_clone_resume.bash))
    .overrideAttrs
      (old: {
        buildCommand = "${old.buildCommand}\n patchShebangs $out";

      });
in
{
  imports = [ ];

  boot.zfs.devNodes = "/dev/disk/by-partuuid";

  services.zfs = {
    autoScrub = {
      enable = true;
      interval = "monthly";
    };
    trim.enable = true;
  };

  environment.systemPackages = with pkgs; [
    zfs_clone_send
    zfs_clone_recv
    zfs_clone_resume
  ];

  environment.persistence."/persist" = lib.mkIf (!config.me.buildingIso) {
    hideMounts = true;
    directories = [
      "/etc/zfs/zpool.cache" # Which zpools to import, the root zpool is already imported and does not need this cache file but this captures additional pools.
    ];
  };
}