There is a new pull request by tornaria against master on the void-packages repository

https://github.com/tornaria/void-packages arpack
https://github.com/void-linux/void-packages/pull/44776

arpack-ng: update to 3.9.0.
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#### Testing the changes
- I tested the changes in this PR: **briefly**

The update was masked since it caused test failures in igraph (https://github.com/igraph/igraph/issues/2311 and https://github.com/opencollab/arpack-ng/issues/401).

Since then a PR fixing the issues has been proposed at https://github.com/opencollab/arpack-ng/pull/414 (that's the added `b3fe4ad7.patch` here).

I've checked the test suite of igraph now passes.

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A patch file from https://github.com/void-linux/void-packages/pull/44776.patch is attached