TMPDIR for building go ports ?

Hi,

On one of my machines where I'm building ports, I have a /tmp
partition that is a too small (300MB) for building many of the go
ports (gitea, facette,...)

Those ports seem to unconditionnaly use /tmp as intermediate storage.

I've plenty of space under /usr/ports. Is there a knob somehere to
tell ports build (via dpb) to write to, let's say /usr/ports/tmp
instead.

(I've tried seting the TMPDIR environment variable without success...)

Thanks.
--
Matthieu Herrb