Are the answers to https://clojurians.slack.com/archives/C02B5GHQWP4/p1640804423369400 still the state-of-the-art for building ClojureScript using tools.build?

you can use the java-command task which takes a basis

ah nevermind the discussion also concluded that. but yes that is still the state of things. the CLJS compilation needs access to your project classpath which build tasks usually don't have. thus forking out is needed