Failed to execute child process “-S” (No such file or directory)

Question

ucore_lab的时候遇到一个环境问题

There was an error creating the child process for this terminal Failed to execute child process “-S” (No such file or directory)

就是重新安装了一个virtualBox虚拟机过后，装上最新的Ubuntu 20 64bit版本，然后重新git clone下来，进入lab1的answer中，运行make lab1-mon，然后就出现以下情形：

希望哪位学长大大能解决一下弟弟的疑惑~~实在是没辙了嗷！