Gradle Kotlin Windows Executable

build.gradle.kts

plugins {
    kotlin("jvm") version "1.4.31"
    id("edu.sc.seis.launch4j") version "2.4.9"
    id("de.undercouch.download") version "4.1.1"
}

task("createExecutableWindows") {
    val jdkVersion = "15.0.2"
    val downloadUrl =
        "https://download.java.net/java/GA/jdk15.0.2/0d1cfde4252546c6931946de8db48ee2/7/GPL/openjdk-15.0.2_windows-x64_bin.zip"
    val downloadPath = "build/dist/jdk.zip"
    val execPath = "exec/win"

    dependsOn("build")
    task<de.undercouch.gradle.tasks.download.Download>("download-jdk-task") {
        src(downloadUrl)
        dest(downloadPath)
        overwrite(false)
    }
    dependsOn("download-jdk-task")
    copy {
        from(zipTree(downloadPath))
        into("build/$execPath")
    }
    val createExec = tasks.withType<edu.sc.seis.launch4j.tasks.DefaultLaunch4jTask> {
        outfile = "MyGame.exe"
        mainClassName = "org.veiset.game.MainKt"
        productName = "Rogue Tower"
        outputDir = execPath
        bundledJre64Bit = true
        jdkPreference = "preferJdk"
        bundledJrePath = "jdk-$jdkVersion"
    }
    dependsOn(createExec)
}