Created attachment 166664 [details]
log generated by portmaster for firefox installation
With /etc/make.conf set to:
the firefox installation by:
portmaster -H -D -B -m MAKE_JOBS_UNSAFE=yes \
fails, generating the attached log file.
Without the WRKDIRPREFIX and PACKAGES settings (actually no /etc/make.conf file) the portmaster instruction above works fine.
Ports tree from a portsnap downloaded 2 February 2016.
(In reply to roger.marsh from comment #0)
Try replacing /home with /usr/home as documented in the Handbook. mozbuild may not like symlinks in path. I'm using WRKDIRPREFIX=$HOME/.cache myself but without /usr/home.
That does it. Perhaps the 500 or so other ports that had worked already blinded me! And the previous two upgrades!
If I understand comment1 right, it solved. So it could closed.