anchor.diff:      "-DLAPACKE=ON"
       "-DCBLAS=ON"
       "-DBUILD_TESTING=ON"
  -  ]
  -  ++ optional shared "-DBUILD_SHARED_LIBS=ON";
  +  ] ++ lib.optional shared "-DBUILD_SHARED_LIBS=ON";
   
     doCheck = true;
   
  
positive.code:   meta = with lib; {
      description = "Linear Algebra PACKage";
      homepage = "http://www.netlib.org/lapack/";
      license = licenses.bsd3;
      platforms = platforms.all;
    };
  
negative.code: { lib
  , stdenv
  , fetchFromGitHub
  , gfortran
  , cmake
  , shared ? true
  }:
  
  stdenv.mkDerivation rec {
    pname = "liblapack";
    version = "3.10.0";
  
    src = fetchFromGitHub {
      owner = "Reference-LAPACK";
      repo = "lapack";
      rev = "v${version}";
      sha256 = "sha256-ewYUM+M7jDO5LLnB4joiKkqgXjEDmWbFZbgad8x98gc=";
    };
  
    nativeBuildInputs = [ gfortran cmake ];
  