diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index 89b0fbfdd..7dfa67bde 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -229,4 +229,8 @@ if (APPLE)
     if (NOT TARGET MoltenVK)
         add_subdirectory(MoltenVK)
     endif()
+
+    if (NOT TARGET epoll-shim)
+        add_subdirectory(epoll-shim)
+    endif()
 endif()