MarsSeed [1] filed a deletion request for boost-numeric-bindings-svn [2]: The SVN repo seems to have been deleted. And according to the GitHub repo of the same code, this has not been developed since 2011 and has been archived since 2020. [a] Upstream URL also states it is no longer maintained (date of the post not given). [b] [a]: https://github.com/inducer/boost-numeric-bindings [b]: http://mathema.tician.de/software/boost-numeric-bindings/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/boost-numeric-bindings-svn/