正确配置 Python 库路径 PYTHONPATH 及命令路径 PATH。批量更新时还需要无密码的 GPG 签名。

• Python >= 3.4
• curl
• git
• makepkg
• zsh (batch)
• nvchecker (batch)
• gpg (batch)
• Local MTA (batch)
• devtools (batch)
• pid_children (batch) (a program to find out descendant processes by pid)

• requests
• lxml
• winterpy (will auto download if not available)
• toposort