anchor.diff:  #, rednose
   , tzlocal
   
  -, channel ? "0.9"
  +, channel ? "latest"
   }:
   
   let
  -  inherit (stdenv.lib)
  +  inherit (lib)
       optionals
       versionOlder;
   
  
positive.code: { stdenv
  , buildPythonPackage
  , fetchPyPi
  
  , aniso8601
  , flask
  
negative.code: 
    doCheck = false;
  
    meta = with lib; {
      description = "Framework for fast, easy and documented API development";
      homepage = https://github.com/noirbizarre/flask-restplus;
      license = licenses.mit;
  