As I understand this is the only way to enable progressive mode currently (Kotlin DSL)?

tasks.withType<KotlinJvmCompile> {
    kotlinOptions {
        freeCompilerArgs += listOf("-Xprogressive")
    }
}

Yes, probably you also can call

freeCompilerArgs.add

, but it depends on freeCompilerArgs implementation

gradle tells me it wants

-progressive

but apart ro mthat i use the same

Looks like there are nicer syntax:

kotlin.sourceSets.all {
    languageSettings.progressiveMode = true
}

hmm, interesting, looks that it’s a new syntax, nice