There's a merged pull request on the void-packages repository

New package: kopia-0.6.4
https://github.com/void-linux/void-packages/pull/24697

Description:
>Kopia is a simple, cross-platform tool for managing encrypted backups in the cloud.
>It provides fast, incremental backups, secure, client-side end-to-end encryption, compression and data deduplication.

https://github.com/kopia/kopia