https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: dev-python/mss-6.1.0 uses a probably incorrect DISTUTILS_USE_SETUPTOOLS value. Discovered on: amd64 (internal ref: tinderbox)
Created attachment 738982 [details] build.log build log and emerge --info
Fixed per https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=67e60bcdf01a5def5c44098cfd8ef1dbc2834c50