Workaround for awkward

km3io/offline.py

@@ -4,6 +4,7 @@ import warnings
 import uproot
 import numpy as np
 import awkward as ak
+import awkward._io  # workaround for https://github.com/scikit-hep/awkward-1.0/issues/968
 
 from .definitions import mc_header
 from .tools import cached_property, to_num, unfold_indices