I think that I'm missing something real basic here. I have code like this:

pluginManager.withPlugin("com.google.devtools.ksp") {
        extensions.configure(KspExtension::class.java) { kspExtension ->
        }
    }

And I'm getting a

java.lang.NoClassDefFoundError: org/jetbrains/kotlin/gradle/plugin/KaptExtension

exception. How is it possible that if a project has the ksp plugin applied doesn't have its extension in the classpath? I see the same problem with kapt and android gradle plugin.

Thanks!