Vitaly Zaitsev via rpmfusion-developers wrote: Thank you for the pointer! With these settings (under %ifarch aarch64): # the RPM Fusion ARM builder runs out of memory during linking with the full # setting below, and even with just force_debug_info, so omit all debuginfo %global debug_config %{nil} # reduce debug info even for the Qt parts to a minimum %global optflags %(echo %{optflags} | sed 's/-g /-g1 /') # tune down SMP to reduce memory use further %global _smp_build_ncpus 6 I obtained a successful build of qt5-qtwebengine-freeworld on aarch64 in 5:38:48, less than half the 13:40:15 that chromium-freeworld took. So qt5- qtwebengine-freeworld is no longer the slowest build in RPM Fusion. :-p Kevin Kofler