diff --git a/wally/suits/io/fio_job.py b/wally/suits/io/fio_job.py
index 39715ef..3d4e886 100644
--- a/wally/suits/io/fio_job.py
+++ b/wally/suits/io/fio_job.py
@@ -1,10 +1,9 @@
-import abc
 import copy
 from collections import OrderedDict
 from typing import Optional, Iterator, Union, Dict, Tuple, NamedTuple, Any, cast
 
+from cephlib.units import ssize2b, b2ssize
 
-from ...utils import ssize2b, b2ssize
 from ..job import JobConfig, JobParams