That assumes you even need an install script. 90% of install scripts just check the platform and make the binary executable and put it in the right place. Just give me links to a github release page with immutable releases enabled and pure binaries. I download the binary but it in a temporary folder, run it with a seatbelt profile that logs what it does. Binaries should "just run" and at most access one folder in a place they show you and that is configurable! Fuck installers.