内部指定这个 mirrors.ustc.edu.cn/，虚拟机是可以上网的，安装程序也正常，但是始终提示联网失败，这个不是离线编译的？ #2
Description
[2025-07-30 02:28:26] lb bootstrap_cdebootstrap
[2025-07-30 02:28:26] lb bootstrap_debootstrap
P: Begin bootstrapping system...
[2025-07-30 02:28:26] lb testroot
P: If the following stage fails, the most likely cause of the problem is with your mirror configuration or a caching proxy.
P: Running debootstrap (download-only)...
I: Retrieving InRelease
I: Retrieving Release
E: Failed getting release file http://mirrors.ustc.edu.cn/debian/dists/buster/Release
P: Begin unmounting filesystems...
P: Saving caches...
if [ -f binary-tar.tar.gz ]; then
tar -jcf linaro-buster-alip-date +%Y%m%d-1.config.tar.bz2 auto/ config/ configure;
sudo mv binary.contents linaro-buster-alip-date +%Y%m%d-1.contents;
sudo mv chroot.packages.live linaro-buster-alip-date +%Y%m%d-1.packages;
sudo mv binary-tar.tar.gz linaro-buster-alip-date +%Y%m%d-1.tar.gz;
md5sum linaro-buster-alip-date +%Y%m%d-1.build-log.txt linaro-buster-alip-date +%Y%m%d-1.config.tar.bz2 linaro-buster-alip-date +%Y%m%d-1.contents linaro-buster-alip-date +%Y%m%d-1.packages linaro-buster-alip-date +%Y%m%d-1.tar.gz > linaro-buster-alip-date +%Y%m%d-1.md5sums.txt;
sha1sum linaro-buster-alip-date +%Y%m%d-1.build-log.txt linaro-buster-alip-date +%Y%m%d-1.config.tar.bz2 linaro-buster-alip-date +%Y%m%d-1.contents linaro-buster-alip-date +%Y%m%d-1.packages linaro-buster-alip-date +%Y%m%d-1.tar.gz > linaro-buster-alip-date +%Y%m%d-1.sha1sums.txt;
fi
Failed to run livebuild, please check your network connection.