How does kotlinx.serialization (v 1.6.3) work with the new K2 (2.0.0-RC2) Kotlin compiler? I get the...

# serialization

[Ulrich Schuster]

How does kotlinx.serialization (v 1.6.3) work with the new K2 (2.0.0-RC2) Kotlin compiler? I get the following warning in my maven project:
[WARNING] Kapt currently doesn't support language version 2.0+. Falling back to 1.9. Does the kotlin serialization plugin still rely on KAPT instead of KSP?

[hfhbd]

kotlinx.serialization does not use kapt or ksp, but its own compiler plugin so the warning is not related to kotlinx serialization.

[Ulrich Schuster]

Then I don't understand where this comes from:
[INFO] --- kotlin:2.0.0-RC2:kapt (default-kapt) @ client ---
[INFO] Applied plugin: 'kotlinx-serialization'
[INFO] Applied plugin: 'spring'
[WARNING] Kapt currently doesn't support language version 2.0+. Falling back to 1.9.