The lowest target we supported with radish was Debian stretch.
Support for stretch lts ended a while ago on June 2022.

The new lowest target will be Debian buster.
Relevant components:

• Python 3.7.3
• python3-docopt (0.6.2-2)
• ipython (5.8.0-1+deb10u1)
• python3-parse (1.6.6-0.1)
• python3-humanize (0.5.1-3)
• python3-lxml (4.3.2-1+deb10u4)