sed -i 's@^\(deb.*stable main\)$@#\1\ndeb https://mirrors.tuna.tsinghua.edu.cn/termux stable main@' $PREFIX/etc/apt/sources.list
apt update && apt upgrade
```
sed -i 's@^\(deb.*stable main\)$@#\1\ndeb https://mirrors.tuna.tsinghua.edu.cn/termux stable main@' $PREFIX/etc/apt/sources.list
apt update && apt upgrade
```
'''
sed -i 's@^\(deb.*stable main\)$@#\1\ndeb https://mirrors.tuna.tsinghua.edu.cn/termux stable main@' $PREFIX/etc/apt/sources.list
apt update && apt upgrade
'''
