MarsSeed [1] filed a deletion request for pybtex-bzr [2]: Can be deleted. Build broken. Bazaar repository abandoned in 2014, source moved to BitBucket Git: https://bitbucket.org/pybtex-devs/pybtex/
Arch has the up-to-date package (last updated 2022-01-31): https://archlinux.org/packages/community/any/python-pybtex/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/pybtex-bzr/
