Bug ID 25866
Summary Gentoo Linux build breaks in some scenarios when both Python 2 and Python 3 are present
Component All Bugs
This may be the same thing as the issue on Arch Linux; however, one of the threads on this indicated some tweaking of build environment variables allowed this to work. I suspect the fix for handling python 2 and python 3 simultaneously with preferential treatment for python 2 would handle this. Filing in case this is a different issue.