Can’t update due to blas
:: blas-openblas and openblas are in conflict (blas). Remove openblas? [y/N] y
:: blas-openblas and cblas are in conflict. Remove cblas? [y/N] y
:: blas-openblas and lapack are in conflict. Remove lapack? [y/N] y
error: failed to prepare transaction (could not satisfy dependencies)
:: unable to satisfy dependency 'openblas' required by blas-openblas

Fix:

https://archlinux.org/news/openblas-0323-2-update-requires-manual-intervention/

OpenBLAS >= 0.3.23-2 update requires manual intervention

2023-06-14 – Felix Yan

The openblas package prior to version 0.3.23-2 doesn’t ship optimized LAPACK routine and CBLAS/LAPACKE interfaces for compatibility. This decision has been reverted now, and the ability to choose a different default system BLAS/LAPACK implementation while keeping openblas installed is now provided to allow future co-installation of BLIS, ATLAS, etc.

The default BLAS implementation will be used for most packages like NumPy or R. Please install “blas-openblas” and “blas64-openblas” to make OpenBLAS the default BLAS implementation, just like the old behavior.

Unfortunately you will get errors on updating if you currently have OpenBLAS installed as the default BLAS implementation:

error: failed to prepare transaction (could not satisfy dependencies) :: installing openblas (0.3.23-2) breaks dependency ‘blas’ required by cblas :: installing openblas (0.3.23-2) breaks dependency ‘blas’ required by lapack

Please append your preferred default BLAS implementation to the regular -Syu command line to get around it. For example:

pacman -Syu blas-openblas

or

pacman -Syu blas

Filed under: Linux - @ June 25, 2023 9:47 am