va2bbw [1] filed a deletion request for linpac-git [2]: Linpac depends on the Linux kernel AX.25 networking stack, which was removed from mainline Linux in April 2026. Current Arch Linux kernels therefore no longer provide the required AX.25 infrastructure, and this PKGBUILD does not provide an alternative out-of-tree implementation. There also has not been any update from upstream in a long time, and I don't think any work is being done to change these dependencies. As a result, the package is currently unusable on a standard Arch Linux installation.
[1] https://aur.archlinux.org/account/va2bbw/ [2] https://aur.archlinux.org/pkgbase/linpac-git/
