It looks like all reverse deps are currently exclusively using the Python3 version:
[vagrant@debian:~/gnome-keysign] $ apt-rdepends -r python3-hkdf Reading package lists... Done Building dependency tree Reading state information... Done python3-hkdf Reverse Depends: magic-wormhole (0.11.2-1) Reverse Depends: python3-spake2 (0.8-2) magic-wormhole Reverse Depends: gnome-keysign (1.2.0-1) gnome-keysign python3-spake2 Reverse Depends: magic-wormhole (>= 0.11.2-1) [vagrant@debian:~/gnome-keysign] $ apt-rdepends -r python-hkdf Reading package lists... Done Building dependency tree Reading state information... Done python-hkdf I will prepare a QA upload removing the Python2 binary package then, if there are no objections. Cheers Sascha