Error on macos installation with go

maybe someone can help me with installing on macos
running go 1.16.4

go install
The go.mod file for the module providing named packages contains one or
more replace directives. It must not contain directives that would cause
it to be interpreted differently than if it were the main module.

We’re going to switch to a different way of doing this and not use a replace directive in go.mod, tracked in Unfork certstore · Issue #2005 · tailscale/tailscale · GitHub

When that issue is closed, you should be able to git pull and build.