security/nss build failure under poudriere, "symlink creation race", head -r363590 FreeBSD and head -r543636 ports

[Tatsuki Makino]

Hmmm, I was using 2 builders by -J 2:4. But I don't remember if there
were other jobs available when nss was building :)
How is your poudriere set up for NO_ZFS? I'm using it with NO_ZFS=yes.
And BASEFS exists within UFS.
I'm suspicious of gmake and UFS on this issue. But I don't know the
details of that :)

Regards.