ARPACK-NG is a collection of Fortran77 subroutines designed to solve large scale eigenvalue problems. This is a fork of ARPACK that is actively maintained. As such, this package will conflict with the ARPACK package. Do not install both. This requires a BLAS/LAPACK implementation. Choose one of these package sets: * OpenBLAS (includes a LAPACK implementation) * atlas, lapack-atlas * blas, lapack (the Netlib reference implementations) If more than one set is installed (assuming there are no packaging conflicts) then the auto-detection will use the first implementation from this list that it finds. If in doubt, choose the Netlib reference implementations; other packages that require a BLAS or LAPACK implementation may not build if they are not configured to detect/use alternate implementations. If the `make check` command fails, try switching to the Netlib reference implementations, or comment out that command at your own risk.