WARNING: A deprecated branch based version specification is used for the dependency zeromq. Please use numbered versions instead. Also note that you can still use the dub.selections.json file to override a certain dependency to use a branch instead.
source/dzmq/socket.d(48,16): Error: cast from `void*` to `immutable(void*)` not allowed in safe code
source/dzmq/socket.d(61,18): Error: cast from `immutable(void*)` to `void*` not allowed in safe code
/opt/dmd-safe/dmd/dmd-safe failed with exit code 1.