Bug#949970: b-d's on python3-dev / python3-dbg but hardcodes 3.7

[Matthias Klose]

Package: src:pivy
Version: 0.6.4-2
Severity: serious
Tags: sid bullseye

b-d's on python3-dev / python3-dbg but hardcodes 3.7 in the rules file.  You
should not hard-code a specific Python3 version.