anchor.diff:            + " " + fs.fsType
             + " " + fs.options
             + " 0"
  -          + " " + (if fs.fsType == "none" || fs.noCheck then "0" else
  +          + " " + (if fs.fsType == "none" || fs.fsType == "btrfs" || fs.noCheck then "0" else
                      if fs.mountPoint == "/" then "1" else "2")
             + "\n"
         )}
  
positive.code:             # Ensure that this job is restarted when fstab changed:
              # ${fstab}
              echo "mounting filesystems..."
  
              # Create missing mount points.  Note that this won't work
              # if the mount point is under another mount point.
  
negative.code:           '';
          };
  
          autoFormat = mkOption {
            default = false;
            type = types.bool;
            description = ''
              If the device does not currently contain a filesystem (as
              determined by <command>blkid</command>, then automatically
              format it with the filesystem type specified in
              <option>fsType</option>.  Use with caution.
            '';
          };
  
          noCheck = mkOption {
            default = false;
            type = types.bool;
  