diff --git a/contrib/packaging/hgpackaging/util.py b/contrib/packaging/hgpackaging/util.py
--- a/contrib/packaging/hgpackaging/util.py
+++ b/contrib/packaging/hgpackaging/util.py
@@ -17,12 +17,12 @@
 
 
 def extract_tar_to_directory(source: pathlib.Path, dest: pathlib.Path):
-    with tarfile.open(source, 'r') as tf:
+    with tarfile.open(str(source), 'r') as tf:
         tf.extractall(dest)
 
 
 def extract_zip_to_directory(source: pathlib.Path, dest: pathlib.Path):
-    with zipfile.ZipFile(source, 'r') as zf:
+    with zipfile.ZipFile(str(source), 'r') as zf:
         zf.extractall(dest)