anchor.diff:        sha256 = "0wjhd87pvpcpvaj3wql2d92g8lpp33iwmxdkp7npic5mjl2y0dsg";
       };
   
  -    buildInputs = [ txamqp zopeInterface twisted ];
  +    buildInputs = [ txamqp zope_interface twisted ];
       propagatedBuildInputs = [ whisper ];
   
       # error: invalid command 'test'
  
positive.code: 
      buildInputs = [ pkgs.unzip ];
  
      propagatedBuildInputs = [ subunit zopeInterface zope_exceptions zope_testing ];
  
      meta = {
        description = "A flexible test runner with layer support";
  
negative.code:       md5 = "2e3829841090d6adff718b8b73c87b6b";
      };
  
      propagatedBuildInputs = [ zope_interface zope_exceptions ];
  
      meta = {
        description = "Zope testing helpers";
  