I had to do this exact thing.
buildSrc/build.gradle.kts
needs to have the Maven dependencies of the plugins instead of the ID:
plugins {
`kotlin-dsl`
}
dependencies {
implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.10")
}
// Not sure if this is necessary or not
// Add it if it is not able to find the dependencies
repositories {
gradlePluginPortal()
}
Then in your convention plugin, you just omit the version.
You can find the correct Maven dependency in the legacy section of the plugin page: