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kotlinlang

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Hi!
I am working on a kotlin multiplatform library with a jvm and javascript portion.
I have updated to Kotlin 1.9.21 last week and everything worked fine. Now suddenly I cannot compile anymore, as *ALL the kotlin stdlib* functionality is *no longer available* to the compiler.
I assume that there is some problem with transitive dependencies pointing to different versions of the kotlin runtime or stdlib. I check this with `./gradlew dependencies` and cannot spot anything "weird".
Soooo... does anyone have an idea, what is wrong here and how I can try to fix this. It is pretty frustrating, that updating kotlin versions always has these kind of "surprises" in store for us.

Ok:
It seems that having kotlinx-serialization with version &gt;= 1.6.1 in the dependencies breaks everything.
The same is true for having kotlinx-datetime with version &gt;= 0.5.0 in the dependencies.

This strikes me as super odd, as the release notes of these libraries explicitely state that kotlin was upgraded to 1.9.21 .

Any idea, why these won't compile in a MP project with kotlin 1.9.21 ?