I see the same in a debian unstable chroot with sbuild.
- Bug#1005149: pybuild not cleanly removing /usr/lib/python3.... William Wilson
- Bug#1005149: pybuild not cleanly removing /usr/lib/pyt... Graham Inggs
- Bug#1005149: pybuild not cleanly removing /usr/lib/pyt... stefanor
- Bug#1005149: ansible: misbuilds with two supported Pyt... Graham Inggs

