{
  disko.devices = {
    nodev = {
      "/" = {
        fsType = "tmpfs";
        mountOptions = [
          "defaults"
          "size=8G"
          "mode=755"
          "nosuid"
          "nodev"
        ];
      };
    };
    disk = {
      main = {
        type = "disk";
        device = "/dev/disk/by-path/pci-0000:04:00.0-nvme-1";
        content = {
          type = "gpt";
          partitions = {
            esp = {
              label = "ESP";
              size = "2G";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
                mountOptions = [ "umask=0077" ];
              };
            };
            cryptroot = {
              label = "CRYPTROOT";
              size = "100%";
              content = {
                type = "luks";
                name = "cryptroot";
                settings = {
                  allowDiscards = true;
                  bypassWorkqueues = true;
                  crypttabExtraOpts = [
                    "same-cpu-crypt"
                    "submit-from-crypt-cpus"
                  ];
                  # unattended boot via usb
                  keyFile = "/dev/disk/by-id/usb-aigo_U330_80101016-0:0";
                  keyFileSize = 512 * 64;
                };
                content = {
                  type = "btrfs";
                  extraArgs = [ "-f" ];
                  subvolumes = {
                    "/persist" = {
                      mountpoint = "/persist";
                      mountOptions = [ "compress=zstd" ];
                    };
                    "/nix" = {
                      mountpoint = "/nix";
                      mountOptions = [ "compress=zstd" ];
                    };
                  };
                };
              };
            };
          };
        };
      };
    };
  };

  fileSystems."/persist".neededForBoot = true;

  environment.globalPersistence = {
    enable = true;
    root = "/persist";
  };

  services.btrfs.autoScrub = {
    enable = true;
    interval = "weekly";
    fileSystems = [ "/persist" ];
  };
}