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

https://github.com/bobertlo/void-packages urxvt
https://github.com/void-linux/void-packages/pull/16099

rxvt-unicode: rebuild to fix perl issue
./rxvtperl.c: loadable library and perl binaries are mismatched (got handshake key 0x8d00080, needed 0x8e00080)

A patch file from https://github.com/void-linux/void-packages/pull/16099.patch is attached