anchor.diff:    src = fetchPypi {
       pname = "oslo.log";
       inherit version;
  -    hash = "sha256-c6tyNKii1QvfUmyHTfocsrEIO6+a2VvC64r1YkidTQE=";
  +    hash = "sha256-+2Xy+dJEI/pt1urY7NIfZlxi4P2fkL8xHkwVO1+Kt+o=";
     };
   
     propagatedBuildInputs = [
  
positive.code: , stdenv
  , buildPythonPackage
  , fetchPypi
  , oslo-config
  , oslo-context
  , oslo-serialization
  
negative.code:   ];
  
    checkInputs = [
      eventlet
      oslotest
      pytestCheckHook
    ];
  