Expected Behavior

%{ext_dll} would expand to .dylib on macos as that is the extension for dynamically libraries on the OS.

Actual Behavior

%{ext_dll} expands to .so on macos.

Specifications

• Version of dune (output of dune --version): 2.9.1
• Version of ocaml (output of ocamlc --version): 4.13.0
• Operating system (distribution and version): macos 11.6