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Yes, see <https://www.pulumi.com/docs/reference/pulumi-yaml/#runtime-options>
Your Pulumi.yaml can point to a binary file to use for go, rather than having pulumi invoking "go build"

Hum. Ok. I want the target build to be a single binary that I can distribute. 

Closest we have to that is using the automation api: <https://www.pulumi.com/docs/guides/automation-api/>
But it's not quite a single binary, because it still needs the "pulumi" executable available as well. There's an issue tracking that <https://github.com/pulumi/pulumi/issues/7219> although given the multi-language nature of automation api it's not clear if we'd ever do this.