I just successfully installed ERPNext v13 with this commands on Debian 10.
sudo apt -y install git vim libffi-dev python-pip python3-distutils python-dev libssl-dev wkhtmltopdf
export LC_ALL=C.UTF-8
wget https://raw.githubusercontent.com/frappe/bench/develop/install.py
sudo python3 install.py --verbose --production --user USER --mariadb-version 10.5 --frappe-branch version-13 --erpnext-branch version-13