{ disks ? [ "/dev/vdb" "/dev/vdc" ], ... }: {
  disk = {
    disk0 = {
      device = builtins.elemAt disks 0;
      type = "disk";
      content = {
        type = "table";
        format = "gpt";
        partitions = [
          {
            name = "nix";
            type = "partition";
            part-type = "primary";
            start = "0%";
            end = "100%";
            bootable = true;
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/a";
            };
          }
        ];
      };
    };
    disk1 = {
      device = builtins.elemAt disks 1;
      type = "disk";
      content = {
        type = "table";
        format = "gpt";
        partitions = [
          {
            name = "root";
            type = "partition";
            part-type = "primary";
            start = "0%";
            end = "100%";
            bootable = true;
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/b";
            };
          }
        ];
      };
    };
  };
}