petsc: add __darwinAllowLocalNetworking = true to support mpiCheck

    ) finalAttrs.buildInputs

  );

  __darwinAllowLocalNetworking = true;

  # This is needed as the checks need to compile and link the test cases with

  # -lpetsc, which is not available in the checkPhase, which is executed before

  # the installPhase. The installCheckPhase comes after the installPhase, so