anchor.diff:    src = fetchPypi {
       inherit pname version;
       sha256 = "b61dadba82acc0838402981b7944155adc092b114ca81f53f61b1d498a512e3a";
  -  };  
  +  };
   
     LC_ALL = "en_US.utf-8";
   
  
positive.code: 
    nativeBuildInputs = [ glibcLocales ];
  
    meta = with stdenv.lib; {
      description = "A module to obtain and visualize band paths in the Brillouin zone of crystal structures.";
      homepage = https://github.com/giovannipizzi/seekpath;
      license = licenses.mit;
      maintainers = with maintainers; [ psyanticy ];
    };
  
negative.code: { stdenv, buildPythonPackage, fetchPypi, numpy, future, spglib, glibcLocales, pytest }:
  
  buildPythonPackage rec {
    pname = "seekpath";
  