The k1 mode is not enabled for local run on 2025.1 EAP

IntelliJ Platform
1

Hi, I want to locally run my plugin in K1 mode on the new IntelliJ IDEA 2025.1 EAP 5 version ( build 251.21418.62). To do this, I add the property -Didea.kotlin.plugin.use.k2=false in builg.gradle.kts, but K1 mode does not get enabled.

tasks.named<RunIdeTask>("runIde") {
    jvmArgumentProviders += CommandLineArgumentProvider {
        listOf("-Didea.kotlin.plugin.use.k2=false")
    }
}

Kotlin settings
Kotlin settings826×256 24.6 KB

Could you let me know if this is a bug or if I’m doing something wrong?
Below, I’m attaching a test plugin that reproduces the issue.