anchor.diff:  
   in pythonPackages.buildPythonApplication rec {
     name = "OctoPrint-${version}";
  -  version = "1.3.2";
  +  version = "1.3.4";
   
     src = fetchFromGitHub {
       owner = "foosel";
       repo = "OctoPrint";
       rev = version;
  -    sha256 = "0wyrxi754xa111b88fqvaw2s5ib2a925dlrgym5mn93i027m50wk";
  +    sha256 = "06l8khbq3waaaa4cqpv6056w1ziylkfgzlb28v30i1h234rlkknq";
     };
   
     # We need old Tornado
  
positive.code:       -e 's,werkzeug>=[^"]*,werkzeug,g' \
        -e 's,psutil>=[^"]*,psutil,g' \
        -e 's,requests>=[^"]*,requests,g' \
        setup.py
    '';
  
  
negative.code:     semantic-version flask_principal werkzeug flaskbabel tornado
      psutil pyserial flask_login netaddr markdown sockjs-tornado
      pylru pyyaml sarge feedparser netifaces click websocket_client
      scandir chainmap future dateutil
    ];
  
    buildInputs = with pythonPackages; [ nose mock ddt ];
  