Saying that, I might be seeing a different issue to yours. Don't think I can get as far as you in compilation, I'm getting FTBFS because of the following error when building vibe.d /opt/usr/include/d/4.9.0/std/conv.d:4884: error: constructor vibe.stream.ssl.SSLStream.this is deprecated - Use createSSLStream instead of directly instantiating SSLStream.