running poudriere on an ipv6-only node - problems with distcache

Hello ports@

Is there any workaround for the following situation:

1. the port's dist files aren't in the pkg distcache for the official builders
2. the other places to try for these files are either github (which is still ipv4 only)
    or from the port's main site which might be ipv4 only

Up until now, I've had to manually fetch the files via a dual stack system and
manually upload into the ipv6 node's distcache.

is there a more elegant workaround?

tia,
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