diff --git a/pkg/repository/events_s2.go b/pkg/repository/events_s2.go
index 1589fbe..1b3536b 100644
--- a/pkg/repository/events_s2.go
+++ b/pkg/repository/events_s2.go
@@ -60,6 +60,8 @@ type scopedS2EventTarget struct {
 // fanout continually opens new TLS connections instead of reusing them.
 func newS2EventClient(token string) *s2.Client {
 	return s2.New(token, &s2.ClientOptions{
+		BaseURL:          s2.LoadConfigFromEnv().BaseURL,          // Klio: a self-hosted S2. See deploy/gcp/beta9-patches.
+		MakeBasinBaseURL: s2.LoadConfigFromEnv().MakeBasinBaseURL, // Klio: as above.
 		HTTPClient:     &http.Client{Transport: http.DefaultTransport, Timeout: s2EventWriteTimeout},
 		RequestTimeout: s2EventWriteTimeout,
 		RetryConfig: &s2.RetryConfig{