diff --git a/build.lua b/build.lua
index 4d5068f..5695aff 100644
--- a/build.lua
+++ b/build.lua
@@ -40,10 +40,13 @@ end
 local sep = '/'
 if os_uname.sysname == "Windows_NT" then sep = '\\' end
 
+local new_ext = ext
+if os_uname.sysname == "Darwin" then new_ext = "so" end
+
 local version = "v0.7.3"
 
-local native_path = plugin_dir..sep.."lua"..sep.."codemp"..sep.."new-native."..ext
-local replace_native_path = plugin_dir..sep.."lua"..sep.."codemp"..sep.."native."..ext
+local native_path = plugin_dir..sep.."lua"..sep.."codemp"..sep.."new-native."..new_ext
+local replace_native_path = plugin_dir..sep.."lua"..sep.."codemp"..sep.."native."..new_ext
 local download_url_native = string.format("https://codemp.dev/releases/lua/codemp-lua-%s-%s-%s.%s", version, arch, platform, ext)
 
 print("downloading codemp native lua extension from '" .. download_url_native .. "' ...")