File libraryJar = findFile(ArtifactInfo.ScalaLibraryID, scalaClasspath);
        URL[] libraryUrls;
        boolean isScala3 = false;
        try {
            File library3Jar = findFile(SCALA_3_LIBRARY_ID, scalaClasspath);
            isScala3 = true;
            libraryUrls = new URL[]{library3Jar.toURI().toURL(), libraryJar.toURI().toURL()};
        } catch (IllegalStateException e) {

            if (nestedJar.exists()) {
                nestedJar.delete()
            }
            nestedJarContents.zipTo(nestedJar)
            if (libraryJar.exists()) {
                libraryJar.delete()
            }
            libraryJarContents.zipTo(libraryJar)
        }

        void createNestedInDirJar() {
            if (nestedInDirJar.exists()) {
                nestedInDirJar.delete()
            }