diff --git a/lib/spack/spack/binary_distribution.py b/lib/spack/spack/binary_distribution.py
index 7902e5fc584d2617fa4b511750a57b7ae6329745..0fb6feae0287eefb7d9fb0c061e0f1647ed64ca9 100644
--- a/lib/spack/spack/binary_distribution.py
+++ b/lib/spack/spack/binary_distribution.py
@@ -903,7 +903,7 @@ def get_keys(install=False, trust=False, force=False):
                     url_util.format(fetch_url_build_cache))
             # For s3 mirror need to request index.html directly
             p, links = web_util.spider(
-                url_util.join(fetch_url_build_cache, 'index.html'), depth=1)
+                url_util.join(fetch_url_build_cache, 'index.html'))
 
             for link in links:
                 if re.search(r'\.key', link) or re.search(r'\.pub', link):