MarsSeed [1] filed a deletion request for openblas-lapack [2]:
Same package is now in [extra], named blas-openblas:
https://archlinux.org/packages/extra/x86_64/blas-openblas/
See announcement about it:
https://archlinux.org/news/openblas-0323-2-update-requires-manual-
intervention/
I have notified AUR maintainers in comments about their need to review
this change, and possibly adapt their PKGBUILD's.
[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/openblas-lapack/