diff --git a/contrib/build-linux/sdist/make_tgz b/contrib/build-linux/sdist/make_tgz
index 6bc7c4b65..28032fe47 100755
--- a/contrib/build-linux/sdist/make_tgz
+++ b/contrib/build-linux/sdist/make_tgz
@@ -42,5 +42,6 @@ git submodule update --init
 
     find -exec touch -h -d '2000-11-11T11:11:11+00:00' {} +
 
-    TZ=UTC faketime -f '2000-11-11 11:11:11' python3 setup.py --quiet sdist --format=zip,gztar
+    # note: .zip sdists would not be reproducible due to https://bugs.python.org/issue40963
+    TZ=UTC faketime -f '2000-11-11 11:11:11' python3 setup.py --quiet sdist --format=gztar
 )