Created attachment 722944 [details] Build Log Going to - /var/tmp/portage/sys-power/bbswitch-0.8_p20200526/work/bbswitch-ddbd243638c7bc2baecf43a78aff46cdc12e9b2e Running make and make install work.
I can't reproduce, perhaps your /usr/src/linux wasn't properly built/configured and it tried to add something that's lacking (but that's not allowed by the sandbox). Please also attach `emerge --info` output if the issue persists.
All i add to do was chmod 755 -R /usr/src/linux has i have umask 077 on the user insted of umask 077 causing problems when i build the kernel without being the user root.