buildSrc.kt

// buildSrc/build.gradle.kts

repositories {
  mavenCentral()
  google()
}

dependencies {
  // add all your plugins artifacts here
  classpath("com.android.tools.build:gradle:3.5.2")
  classpath("com.squareup.sqldelight:gradle-plugin:1.2.0")
  // ...
}

// build.gradle.kts

plugins {
  // load the plugins but do not apply them to the root project
  id("com.android.application").apply(false)
  id("com.squareup.sqldelight").apply(false)
}

// app/build.gradle.kts

plugins {
  // ... 
  id("com.android.application")
}

// lib/build.gradle.kts

plugins {
  // ... 
  id("com.squareup.sqldelight")
}