Due to the outdated version of dhcpy6d available at Debian there is now an own dhcpy6d repository available, delivering the latest stable versions of Debian and RedHat/CentOS packages.

It works at least for Debian 10 and Ubuntu 20.04.
Add the following source to your Debian APT sources:

deb https://dhcpy6d.ifw-dresden.de/files/repo/stable/debian/ /

Add the gpg key to your APT keyring:

wget -q -O - https://dhcpy6d.ifw-dresden.de/files/repo/stable/debian/key.gpg | apt-key add -

To use the RedHat/CentOS 8 repository simply add the following to your repository information:

[dhcpy6d-stable]
name=dhcpy6d-stable
baseurl=https://dhcpy6d.ifw-dresden.de/files/repo/stable/centos/
gpgcheck=1
gpgkey=https://dhcpy6d.ifw-dresden.de/files/repo/stable/centos/RPM-GPG-KEY-dhcpy6d
enabled=1