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

https://github.com/skmpz/void-packages ilmbase-2.5.2
https://github.com/void-linux/void-packages/pull/23869

ilmbase: update to 2.5.2


A patch file from https://github.com/void-linux/void-packages/pull/23869.patch is attached