bundleJar.manifest = Manifest()
        builder.setJar(bundleJar)

        val validClasspath = classpath.filter { it.exists() && (it.isDirectory || isZip(it)) }
        builder.setProperty("project.buildpath", validClasspath.asPath)
        builder.setClasspath(validClasspath.files.toTypedArray())

        val validSourcepath = sourcepath.filter { it.exists() }