{
  type = "btrfs";
  extraArgs = ["-f"];
  subvolumes = {
    "/root" = {
      mountpoint = "/";
      mountOptions = ["compress=zstd" "noatime"];
    };
    "/persist" = {
      mountpoint = "/persist";
      mountOptions = ["subvol=persist" "compress=zstd" "noatime"];
    };
    "/nix" = {
      mountpoint = "/nix";
      mountOptions = ["subvol=nix" "compress=zstd" "noatime"];
    };
  };
}