Kotlin Gradle DSL - Precompiled script in buildSrc not working - gradle

Question

I am using Gradle version 4.10.3 (need Android support) and am trying to put a test precompiled script into my buildSrc folder for use with various modules within the project. Here is my basic code setup:
//maven-deploy.gradle.kts, a custom precompiled plugin under
// buildSrc\src\main\kotlin\maven-deploy.gradle.kts
plugins {
maven
signing
}
//a test task
tasks {
register("hello") {
doLast {
println("hello")
}
}
}
//buildSrc build.gradle.kts
plugins {
`kotlin-dsl`
`kotlin-dsl-precompiled-script-plugins`
}
repositories {
jcenter()
}
//main project root's build.gradle.kts
plugins {
base
kotlin("jvm") version Vof.kotlin apply false
kotlin("android") version Vof.kotlin apply false
kotlin("android.extensions") version Vof.kotlin apply false
id("kotlinx-serialization") version Vof.kotlin apply false
id("maven-deploy")
}
and I'm getting this error:
error:Plugin [id: 'maven-deploy'] was not found in any of the following sources:
- Gradle Core Plugins (not a core plugin, please see https://docs.gradle.org/4.10.3/userguide/standard_plugins.html for available core plugins)
- Plugin Repositories (plugin dependency must include a version number for this source)
Am I doing this incorrectly? I am following this guide on the Gradle website. Is this outdated? Any help is appreciated!
EDIT: I got this working by adding java-gradle-plugin (with tildes) to the buildSrc's build.gradle.kts file under plugins. Not sure if that is the correct way to go about this, however.