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-rw-r--r--morphlib/builder2.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/morphlib/builder2.py b/morphlib/builder2.py
index 674cbb17..c7d25e1a 100644
--- a/morphlib/builder2.py
+++ b/morphlib/builder2.py
@@ -730,7 +730,8 @@ class DiskImageBuilder(SystemKindBuilder): # pragma: no cover
chatty=True)
with os.fdopen(image_file_fd, "rb") as ifh:
ofh = gzip.GzipFile(
- fileobj=handle, mode="wb", compresslevel=1)
+ fileobj=handle, filename='', mode="wb",
+ compresslevel=1)
shutil.copyfileobj(ifh, ofh, 1024 * 1024)
ofh.close()