JakobJung [1] filed a orphan request for ttf-impallari-cabin-font [2]: The PKGBUILD is broken. After posting a possible solution, no reaction from maintainer for two weeks has been noticed. The same issue currently exists with another package of the same maintainer(https://aur.archlinux.org/packages/ttf-impallari-dosis/).
[1] https://aur.archlinux.org/account/JakobJung/ [2] https://aur.archlinux.org/pkgbase/ttf-impallari-cabin-font/
