Ah, I see this example is pretty much exactly what I'm after https://github.com/pulumi/examples/blob/master/aws-ts-serverless-raw/index.ts. Is there a reason you wanted to explicitly create the stage? https://github.com/pulumi/examples/blob/0cd79d7c10bd5198f13326d2660d84fbd60fa5ed/aws-ts-serverless-raw/index.ts#L107-L108