  Let S be a commutative ring with topologically noetherian spectrum and let R
be the absolutely flat approximation of S. We prove that subsets of the
spectrum of R parametrise the localising subcategories of D(R). Moreover, we
prove the telescope conjecture holds for D(R). We also consider unbounded
derived categories of absolutely flat rings which are not semi-artinian and
exhibit an example of a cohomological Bousfield class that is not a Bousfield
class.
