On a Gradle project, add a file called generated-kotlin-sources.gradle:

apply plugin: 'idea'

idea {
    module {
        sourceDirs += files(
            'build/generated/source/kapt/main',
            'build/generated/source/kaptKotlin/main',
            'build/tmp/kapt/main/kotlinGenerated')
        generatedSourceDirs += files(
            'build/generated/source/kapt/main',
            'build/generated/source/kaptKotlin/main',
            'build/tmp/kapt/main/kotlinGenerated')
    }
}

Then, in the build.gradle file, add the following content:

apply plugin: 'kotlin-kapt'
apply from: rootProject.file('gradle/generated-kotlin-sources.gradle')

Add a new dependency in the build.gradle file:

dependencies {
    ...
    kapt    'io.arrow-kt:arrow-annotations-processor:0.5.2'
    ...     
}

Once configured, you can generate Arrow code with a normal build command, ./gradlew build.