Since Setuptools 58+ upstream removed support for 2to3 during builds. This is breaking change and thus package is FTBFS. For more info see this change: https://fedoraproject.org/wiki/Changes/Setuptools_58%2B
https://github.com/dmeranda/demjson/issues/40
Fixed: https://koji.fedoraproject.org/koji/taskinfo?taskID=82154345