aoleynichenko [1] filed a orphan request for avogadro [2]:
it seems that this package is not supported by any maintainer for 1.5
years. maybe it will be better to delete the package 'avogadro' from
AUR and after it I will create the new package with the same name?
https://github.com/avogadro
[1] https://aur.archlinux.org/account/aoleynichenko/
[2] https://aur.archlinux.org/pkgbase/avogadro/