A note tells the user to uncomment the DISTCC_TMPDIR line in /etc/make.conf. This line does not exist in /etc/make.conf. Reproducible: Always Steps to Reproduce: 1. 2. 3.
Whoops. That should be 'PORTAGE_TMPDIR' under code listing 2.3 (second note).
upgrade your portage to get the variable in your make.conf
s/DISTCC_TMPDIR/PORTAGE_TMPDIR/ on second note under 2.3 applied and committed.