Alternatively, you can try a more automated approach using Arch: iamSlightlyWind/android_chroot
Make sure your device is rooted, and your kernel supports switching SELinux to Permissive. If not, trying to set SELinux to Permissive will cause a system-wide crash.
termux-setup-storage
echo "allow-external-apps = true" >> .termux/termux.properties
apt update