MarsSeed [1] filed a deletion request for dseams [2]: Abandoned. Broken: this last version is from 2020 and not compatible with current Arch/extra/eigen. There's an AUR/dseams-git; upstream's 'main' branch is still getting maintained and that code supports the current eigen v3. Please keep only that package (despite being an orphan), as that seems to be the only viable build that Arch users can use. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/dseams/