MarsSeed [1] filed a deletion request for librm-git [2]: Build is broken on current Arch Linux (incompatible with current gupnp).
But librm is actually no longer needed by Roger Router and is EOL: https://gitlab.com/tabos/librm/-/issues/4 [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/librm-git/
