diff --git a/lib/spack/spack/util/web.py b/lib/spack/spack/util/web.py
index ba3817bb5f9..fbd4ea8c5a4 100644
--- a/lib/spack/spack/util/web.py
+++ b/lib/spack/spack/util/web.py
@@ -263,7 +263,7 @@ def remove_url(url):
 
     if url.scheme == 's3':
         s3 = s3_util.create_s3_session(url)
-        s3.delete_object(Bucket=url.s3_bucket, Key=url.path)
+        s3.delete_object(Bucket=url.netloc, Key=url.path)
         return
 
     # Don't even try for other URL schemes.