force pbulk to use a prebuilt package

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello
I'm trying to run a pbulk for a limited set of packages on evbarm
from pkgsrc-2025Q1.
Unfortunably this set pull in rust, which fails with:
memory allocation of 1900548 bytes failed
(the host has 1Gb RAM and 4Gb swap). 

I tried adding rust-1.83.0.tgz from TNF's 2025Q1 build to the packages,
but pbulk insists on rebuilding it.

Is there a way to force pbulk to use the prebuilt one ?
Or at last find why it wants to rebuild it ?


-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--