Okay, I wasn't aware that we had a snapshot, but then you can use that as well.
Be aware however that it is not supported to build a newer version of 3.3.1 with an older version of 3.3.1 (it might work most of the time, but it's no guarantee and we absolutely don't care here). So this means that if you need a fix you either need to wait for the next snapshot or you need to build it yourself like I have explained. Only once 3.4.0 is released with support for aarch64-freebsd this situation changes, cause the last release can then be used to build the development version.