remove_slink(){
    # if previous version install script created symbolic links
    [[ -s /usr/local/bin/genymotion ]] && rm /usr/local/bin/genymotion
    [[ -s /usr/local/bin/genymotion-shell ]] && rm /usr/local/bin/genymotion-shell
}

pre_install() {
    remove_slink
}