https://bugzilla.redhat.com/show_bug.cgi?id=1803945
--- Comment #7 from Ralf Senderek fedora@senderek.ie --- There are two more changes to be made to the spec file:
1) Remove the Group tag. (see https://fedoraproject.org/wiki/Changes/Remove_Group_Tag)
2) Use the parallel make %{?_smp_mflags} macro.