Can't use an ObserverVec with promhttp.InstrumentHandlerDuration() #1258

I'm trying to instrument my http.Handler with promhttp.InstrumentHandlerDuration, like so:

duration :=  prometheus.NewSummaryVec(
	prometheus.SummaryOpts{
		Name:       "request_duration_seconds",
		Help:       "Request duration",
		Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
	},
	[]string{"code", "method"},
)

// ...
http.Handle("/", promhttp.InstrumentHandlerDuration(duration, handler))

However, this causes a runtime panic because prometheus.summary doesn't conform to the ExemplarObserver interface.

2023/04/22 14:47:25 http: panic serving 127.0.0.1:56256: interface conversion: *prometheus.summary is not prometheus.ExemplarObserver: missing method ObserveWithExemplar

It's not clear to me how to resolve this issue - unfortunately the documentation for InstrumentHandlerDuration doesn't discuss the matter, nor does the example provided (I'd be curious if the example as written even works!)