anchor.diff:  
     nativeBuildInputs = [ gfortran cmake ];
   
  +  # Configure stage fails on aarch64-darwin otherwise, due to either clang 11 or gfortran 10.
  +  hardeningDisable = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ "stackprotector" ];
  +
     cmakeFlags = [
       "-DCMAKE_Fortran_FLAGS=-fPIC"
       "-DLAPACKE=ON"
  
positive.code: 
    doCheck = true;
  
    meta = with lib; {
      inherit version;
      description = "Linear Algebra PACKage";
  
negative.code:   version = "3.9.0";
  in
  
  stdenv.mkDerivation rec {
    pname = "liblapack";
    inherit version;
  
  