It is git package, build fails can happen however this is not updated since October 2016 and reported to fail to build since March 2017 on github. About the other package is quite the contrary, Enverex have created duplicates (-ex) of already existing packages https://aur.archlinux.org/packages/?K=Enverex&SeB=m Il 19/06/2018 15:18, notify--- via aur-requests ha scritto:

OJaksch [1] filed a deletion request for libretro-frodo-git [2]:

Doesn't build anymore and competes with libretro-frodo-ex-git, which is using the same source