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

https://github.com/tehnick/void-packages update-eiskaltdcpp
https://github.com/void-linux/void-packages/pull/29194

eiskaltdcpp-qt: update to 2.4.2


A patch file from https://github.com/void-linux/void-packages/pull/29194.patch is attached