anchor.diff:  
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "0zn5wi47m8pn4amx574ryyhqvhynipxzyxbx0878ap6g36vh6l1h";
  +    sha256 = "1v6wwsncgnhlg5c7gsmzcp52hfblfnz5kf5pk4d0zybflsxak02d";
     };
   
     postPatch = ''
       echo ${version} > gdbgui/VERSION.txt
       # remove upper version bound
       sed -ie 's!, <.*"!"!' setup.py
  +    sed -i 's/greenlet==/greenlet>=/' setup.py
     '';
   
     postInstall = ''
  
positive.code:     homepage = "https://www.gdbgui.com/";
      license = licenses.gpl3;
      platforms = platforms.unix;
      maintainers = with maintainers; [ yrashk ];
    };
  }
  
negative.code: , fetchPypi
  , gdb
  , flask
  , six
  , bidict
  , python-engineio
  , python-socketio
  , flask-socketio
  , flask-compress
  , pygdbmi
  