There is an updated pull request by ar-jan against master on the void-packages repository

https://github.com/ar-jan/void-packages vtk922
https://github.com/void-linux/void-packages/pull/40423

vtk: update to 9.2.2
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#### Testing the changes
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The `-DVTK_MODULE_USE_EXTERNAL_vtknlohmannjson` configure arg did not have any effect (which makes the build fail), so the only way I could get it to build was with `DVTK_USE_EXTERNAL=OFF`. I'm not sure if this is problematic.

A patch file from https://github.com/void-linux/void-packages/pull/40423.patch is attached