Your package python-lettuce failed to build from source in current F28. https://koji.fedoraproject.org/koji/taskinfo?taskID=24874682 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
BuildRequires: python-django So this needs to either be updated for django 2.0 or retired...
Confirmed with Slavek, we should retire.
Retired in f28 and master.