private
    fun someClassesInDefaultPackage(): Sequence<Path> {
        val directory = projectDir.resolve("classes-default")

        DEFAULT_EXCLUDES_FOR_TEST.forEachIndexed { i, pkg ->
            touchFile(directory.resolve("$pkg/Foo$i.class"))
        }

        return sequenceOf(directory)
    }

    private
    fun aJar(sourceFiles: Sequence<Path>): Sequence<Path> {

    val kotlinVersion = "1.9.23"

    fun futureKotlin(module: String) = "org.jetbrains.kotlin:kotlin-$module:$kotlinVersion"

    val ansiControlSequenceUtil = "net.rubygrapefruit:ansi-control-sequence-util"
    val ant = "org.apache.ant:ant"
    val antLauncher = "org.apache.ant:ant-launcher"
    val antJunit = "org.apache.ant:ant-junit"
    val asm = "org.ow2.asm:asm"
    val asmAnalysis = "org.ow2.asm:asm-analysis"