rust 1.72.0 in poudriere-devel keeps getting rebuilt

Hello arm@

What can I do to stop rust being rebuilt all the time in my poudriere-devel on rpi4?

1. the version on pkg.freebsd.org at present is 1.72.0

2. the Makefile in the ports tree also says 1.72.0

3. poudriere is not building it in its filelist of ports-to-build, but as a dependency

4. rust cannot build on a bigger faster machine with poudriere & qemu for arm64.aarch64 
because rust will not build under qemu-user-static

5. I've tried running a build with no make.conf for the poudriere to use. It still
tries to build locally, instead of just downloading the binary like it downloads other unchanged binaries. No options for rust have been locally set, for the poudriere instance.

Is there a workaround that allows one to add the precompiled package so poudriere will use it to compile packages that need it?