Trying to config Serilog with .net core 2 console app using generic HostBuilder

Trying to follow the docs here
https://github.com/serilog/serilog-extensions-hosting

Have these packages referenced in my project

<PackageReference Include="Serilog" Version="2.8.0" /> <PackageReference Include="Serilog.Sinks.File" Version="4.0.0" /> 

When I try to add the line UseSeriLog, it cant be recognized

Error CS1061 'IHostBuilder' does not contain a definition for 'UseSeriLog' and no accessible extension method 'UseSeriLog' accepting a first argument of type 'IHostBuilder' could be found (are you missing a using directive or an assembly reference?)

My main method:

private static async Task Main(string[] args) { var isService = !(Debugger.IsAttached || args.Contains("--console")); Log.Logger = new LoggerConfiguration() .WriteTo.File(@"d:\temp\consoleapp.log") .CreateLogger(); var hostBuilder = new HostBuilder() .ConfigureHostConfiguration(configHost => { configHost.AddCommandLine(args); }) .UseContentRoot(@"D:\Services\BldgRunner\") .ConfigureAppConfiguration((hostingContext, config) => { var env = hostingContext.HostingEnvironment; config.AddCommandLine(args); config.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true); config.AddEnvironmentVariables(); }) .ConfigureServices((hostContext, services) => { //Inject additional services as needed services.AddHostedService<JobRunner>(); }) **.UseSeriLog()** .Build(); if (isService) { await hostBuilder.RunAsServiceAsync(); } else { await hostBuilder.RunConsoleAsync(); } }