flexiblas?
      ( sci-libs/flexiblas[system-blas
            (-)
      ,index64
            (-)
      ?
] sci-libs/blas-lapack-aux-wrapper[index64?
] )

!flexiblas?
      ( >=sci-libs/lapack-3.10.0[eselect-ldso
            (-)
      ?
,-flexiblas
            (-)
      ,index64
            (-)
      ?
] eselect-ldso?
            ( ||
                  ( >=sci-libs/lapack-3.10.0[eselect-ldso
                        (-)
                  ] sci-libs/openblas[eselect-ldso
                        (-)
                  ] )
             )
       )