From #gentoo-portage: [Aug 22 18:43:06] <floppym> zmedico: Is it expected that portage would ignore QA_PREBUILT if it is set in one of the phase functions (like src_install)? [Aug 22 18:45:08] <zmedico> floppym: yes, I typically advise people who ask this to simply set QA_PREBUILT="*" in global scope For nvidia-drivers, you could do something like this: QA_PREBUILT="opt/* usr/lib*" This would still enable the checks for the kernel module, which is installed in /lib.
grumble, I liked the incremental addition solution.... Fixed in 304.43.