jjpk [1] filed a deletion request for boost-compute [2]: This boost library is now part of the boost package in extra (which is a dependency). This package can therefore no longer be installed, since its files conflict with those of its dependency. Users should just install boost, and those who installed boost-compute (and therefore boost) earlier simply need to keep their systems up-to-date with extra (which will bring this library's code through the boost package). [1] https://aur.archlinux.org/account/jjpk/ [2] https://aur.archlinux.org/pkgbase/boost-compute/