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-rw-r--r--src/libstore/s3-binary-cache-store.cc4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libstore/s3-binary-cache-store.cc b/src/libstore/s3-binary-cache-store.cc
index 5fc7371a5198..6a0f19238add 100644
--- a/src/libstore/s3-binary-cache-store.cc
+++ b/src/libstore/s3-binary-cache-store.cc
@@ -241,8 +241,8 @@ struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore
             auto & error = res.GetError();
             if (error.GetErrorType() == Aws::S3::S3Errors::RESOURCE_NOT_FOUND
                 || error.GetErrorType() == Aws::S3::S3Errors::NO_SUCH_KEY
-                || (error.GetErrorType() == Aws::S3::S3Errors::UNKNOWN // FIXME
-                    && error.GetMessage().find("404") != std::string::npos))
+                // If bucket listing is disabled, 404s turn into 403s
+                || error.GetErrorType() == Aws::S3::S3Errors::ACCESS_DENIED)
                 return false;
             throw Error(format("AWS error fetching '%s': %s") % path % error.GetMessage());
         }