diff --git a/swh/loader/mercurial/hgutil.py b/swh/loader/mercurial/hgutil.py
--- a/swh/loader/mercurial/hgutil.py
+++ b/swh/loader/mercurial/hgutil.py
@@ -4,10 +4,11 @@
 # See top-level LICENSE file for more information
 
 import io
-from multiprocessing import Process, Queue
 import traceback
 from typing import Dict, NewType
 
+from billiard import Process, Queue
+
 # The internal Mercurial API is not guaranteed to be stable.
 from mercurial import context, error, hg, smartset, util  # type: ignore
 import mercurial.ui  # type: ignore