anchor.diff:    pname = "acme";
   
     propagatedBuildInputs = [
  -    cryptography pyasn1 pyopenssl pyRFC3339 pytz requests six werkzeug mock
  -    ndg-httpsclient josepy
  +    cryptography pyasn1 pyopenssl pyRFC3339 pytz requests requests-toolbelt six
  +    werkzeug mock ndg-httpsclient josepy
     ];
   
  -  checkInputs = [ nose ];
  +  checkInputs = [ nose pytest ];
   
     postUnpack = "sourceRoot=\${sourceRoot}/acme";
   
  
positive.code: { buildPythonPackage
  , certbot
  , nose
  , cryptography
  , pyasn1
  , pyopenssl
  
negative.code: , josepy
  , pytz
  , requests
  , requests-toolbelt
  , six
  , werkzeug
  , mock
  