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-rw-r--r--lib/spack/spack/binary_distribution.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/spack/spack/binary_distribution.py b/lib/spack/spack/binary_distribution.py
index a9b1d6280b..5559e89820 100644
--- a/lib/spack/spack/binary_distribution.py
+++ b/lib/spack/spack/binary_distribution.py
@@ -913,7 +913,7 @@ def _read_specs_and_push_index(file_list, read_method, cache_prefix, db, temp_di
index_json_path,
url_util.join(cache_prefix, "index.json"),
keep_original=False,
- extra_args={"ContentType": "application/json"},
+ extra_args={"ContentType": "application/json", "CacheControl": "no-cache"},
)
# Push the hash
@@ -921,7 +921,7 @@ def _read_specs_and_push_index(file_list, read_method, cache_prefix, db, temp_di
index_hash_path,
url_util.join(cache_prefix, "index.json.hash"),
keep_original=False,
- extra_args={"ContentType": "text/plain"},
+ extra_args={"ContentType": "text/plain", "CacheControl": "no-cache"},
)