var events = builder
    .AddKafka("events")
    .WithKafkaUI(configureContainer =>
    {
        configureContainer.WithExplicitStart();
    });

fail: Aspire.Hosting.Dcp.DcpExecutor[0]
      Failed to start resource kafka-ui
      System.ArgumentException: An item with the same key has already been added. Key: KAFKA_CLUSTERS_0_NAME
         at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
         at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
         at Aspire.Hosting.KafkaBuilderExtensions.<WithKafkaUI>g__ConfigureKafkaUIContainer|5_0(EnvironmentCallbackContext context, EndpointReference endpoint, Int32 index) in /_/src/Aspire.Hosting.Kafka/KafkaBuilderExtensions.cs:line 143
         at Aspire.Hosting.KafkaBuilderExtensions.<>c__DisplayClass5_1.<WithKafkaUI>b__2(EnvironmentCallbackContext context) in /_/src/Aspire.Hosting.Kafka/KafkaBuilderExtensions.cs:line 122
         at Aspire.Hosting.ApplicationModel.EnvironmentCallbackAnnotation.<>c__DisplayClass3_0.<.ctor>b__0(EnvironmentCallbackContext c) in /_/src/Aspire.Hosting/ApplicationModel/EnvironmentCallbackAnnotation.cs:line 59
         at Aspire.Hosting.ApplicationModel.ResourceExtensions.ProcessEnvironmentVariableValuesAsync(IResource resource, DistributedApplicationExecutionContext executionContext, Action`4 processValue, ILogger logger, String containerHostName, CancellationToken cancellationToken) in /_/src/Aspire.Hosting/ApplicationModel/ResourceExtensions.cs:line 352
         at Aspire.Hosting.Dcp.DcpExecutor.BuildEnvVarsAsync(ILogger resourceLogger, IResource modelResource, CancellationToken cancellationToken) in /_/src/Aspire.Hosting/Dcp/DcpExecutor.cs:line 1974
         at Aspire.Hosting.Dcp.DcpExecutor.CreateContainerAsync(AppResource cr, ILogger resourceLogger, CancellationToken cancellationToken) in /_/src/Aspire.Hosting/Dcp/DcpExecutor.cs:line 1506
         at Aspire.Hosting.Dcp.DcpExecutor.StartResourceAsync(IResourceReference resourceReference, CancellationToken cancellationToken) in /_/src/Aspire.Hosting/Dcp/DcpExecutor.cs:line 1829