improve addonDir addon installation

buildSrc/src/main/kotlin/AddonConfig.kt

@@ -3,7 +3,6 @@ import java.io.File
 import java.util.function.Predicate
 import org.gradle.api.Project
 import org.gradle.api.Task
-import org.gradle.jvm.tasks.Jar
 import org.gradle.kotlin.dsl.extra
 import kotlin.streams.asStream
 
@@ -12,8 +11,9 @@ import kotlin.streams.asStream
  * Configures a directory where addons will be put.
  */
 fun Project.addonDir(dir: File, task: Task) {
-    task.dependsOn("compileAddons")
+    val moveAddons = tasks.register("moveAddons" + task.name) {
-    task.doFirst {
+            dependsOn("compileAddons")
+            doLast {
                 dir.parentFile.mkdirs()
                 matchingAddons(dir) {
                     it.name.startsWith("Terra-") // Assume everything that starts with Terra- is a core addon.
@@ -34,6 +34,10 @@ fun Project.addonDir(dir: File, task: Task) {
                     jar.archiveFile.orNull?.asFile?.copyTo(target)
                 }
             }
+            
+        }
+    
+    task.dependsOn(moveAddons)
 }
 
 fun matchingAddons(dir: File, matcher: Predicate<File>): Set<File> {