Merge #211890: python3Packages.scipy: schedule as big-parallel

...into staging

pkgs/development/python-modules/scipy/default.nix

···
     runHook postCheck
   '';
 
+  requiredSystemFeatures = [ "big-parallel" ]; # the tests need lots of CPU time
+
   passthru = {
     blas = numpy.blas;
   };