How do I declare extra properties in build.gradle.kts?

Question

I want to write this Groovy in Kotlin code in the build.gradle.kts file at the top-level project. How do I write it correctly?

build-script {
   ext {
       ...
       lifecycle_version = '2.5.1'
   }
}

Answer 1

Hope this helps:

buildscript {
    ext {
        ...
        lifecycleVersion = "2.5.1"
    }
}