anchor.diff:  
     propagatedBuildInputs = [ atlas ];
     buildInputs = [ gfortran cmake ];
  +  buildNativeInputs = [ python ];
   
     cmakeFlags = [
       "-DUSE_OPTIMIZED_BLAS=ON"
  
positive.code: { stdenv, fetchurl, gfortran, atlas, cmake }:
  
  stdenv.mkDerivation {
    name = "liblapack-3.4.0";
  
negative.code:     "-DCMAKE_Fortran_FLAGS=-fPIC"
    ];
  
    doCheck = true;
  
    checkPhase = "
      sed -i 's,^#!.*,#!${python}/bin/python,' lapack_testing.py
      ctest
    ";
  
    enableParallelBuilding = true;
  
    passthru = {
      blas = atlas;
    };
  
    meta = {
      description = "Linear Algebra PACKage";
  