numpy-blas.nix

 buildInputs = [
    (pkgs.python35.withPackages (pypkgs: with pypkgs; [ 
      (pkgs.hiPrio (pypkgs.numpy.overrideAttrs (oldAttrs: rec {
        passthru = oldAttrs.passthru // { blas = pkgs.blas; };
      })))
    ]))
  ];