nixos/hosts/common/disks/btrfs/legacy.nix

{
  disko.devices = {
    disk = {
      main = {
        type = "disk";
        device = "/dev/sda";
        content = {
          type = "gpt";
          partitions = {
            BOOT = {
              size = "1M";
              type = "EF02";
              priority = 1;
            };
            ESP = {
              size = "512M";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
                mountOptions = ["umask=0077"];
              };
            };
            root = {
              size = "100%";
              content = {
                type = "btrfs";
                extraArgs = ["-f"];
                subvolumes = {
                  "/root" = {
                    mountpoint = "/";
                  };

                  "/persist" = {
                    mountOptions = ["subvol=persist"];
                    mountpoint = "/persist";
                  };

                  "/nix" = {
                    mountOptions = ["subvol=nix" "noatime"];
                    mountpoint = "/nix";
                  };

                  "/swap" = {
                    mountOptions = ["noatime"];
                    mountpoint = "/.swapvol";
                  };
                };
              };
            };
          };
        };
      };
    };
  };
}