I had the same gut reaction, but deleted it. `dylib` shows up in a bunch of other places, but only in connection with `$(INSTALL_NAME_CMD)` or `$(INSTALL_NAME_CHANGE_CMD)` which [are ignored on non-Mac](https://github.com/JuliaLang/julia/blob/0dcd3ef422133314a62785a7fe84e33cf4a7ad23/Make.inc#L420-430).