anchor.diff:      inherit pname version;
       sha256 = "sha256-KVKUSPGGLXOusflL4OjzXdJDGi66q+895qvtaBrSFG8=";
     };
  +
  +  disabled = pythonOlder "3.7";
   
     propagatedBuildInputs = [
       cerberus
  
positive.code: { lib
  , buildPythonPackage
  , fetchPypi
  , flask
  , events
  , pymongo
  
negative.code:   meta = with lib; {
      homepage = "https://python-eve.org/";
      description = "Open source Python REST API framework designed for human beings";
      changelog = "https://github.com/pyeve/eve/blob/v${version}/CHANGES.rst";
      license = licenses.bsd3;
      maintainers = [ maintainers.marsam ];
    };
  