On Wednesday, 21 December 2016 at 16:49:53 UTC, Damian wrote: > SO_REUSEPORT is not supported on Windows. Is is supported on linux. On Windows the behavior of SO_REUSEPORT is included in SO_REUSEADDR. I submitted an issue to get this fixed for Linux. https://issues.dlang.org/show_bug.cgi?id=17416