UMFPACK is a set of routines for solving unsymmetric sparse linear
systems, Ax=b, using the Unsymmetric MultiFrontal method.

This package is part of SuiteSparse.

This requires a BLAS implementation.  Choose one of these package sets:
 * OpenBLAS
 * atlas
 * blas (the Netlib reference implementation)
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.