There is an updated pull request by tranzystorek-io against master on the void-packages repository

https://github.com/tranzystorek-io/void-packages rust
https://github.com/void-linux/void-packages/pull/42130

[WIP] Rust 1.68
TODO:

- [x] ~~Generate boostrap packages for ppc~~ dropped support

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A patch file from https://github.com/void-linux/void-packages/pull/42130.patch is attached