MarsSeed [1] filed a deletion request for lib32-coin-or-cgl [2]: lib32 package but build links against 64-bit dependencies. Upon requesting fix from package owner, they just disowned it. I suggest it's safe to delete this package, nothing depends on it. Only 64-bit version is needed by open source mathemathics software like SAGE, and all those are hosted in Arch repos. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/lib32-coin-or-cgl/