(In reply to Marcus R�ckert from comment #10) > I would still push for a shared make_jobs macro that works for both. I fully agree - but currently the cmake-provided macro breaks Qt builds while the Qt-provided macro doesn't break cmake builds (ninja isn't used yet). The %make_jobs macro implies that "make" is used any not "ninja", so IMO that macro needs to be renamed into %build_jobs or something else.