diff --git a/port/moonlight/CMakeLists.txt b/port/moonlight/CMakeLists.txt
index a25ff5c..5edf9da 100644
--- a/port/moonlight/CMakeLists.txt
+++ b/port/moonlight/CMakeLists.txt
@@ -35,18 +35,24 @@ target_link_libraries(moonlight_platform_common PUBLIC
   c
   threadx)
 
-add_library(moonlight_network_driver OBJECT
-  ${MOONLIGHT_SRC_DIR}/mnrs_network_driver.c)
-target_link_libraries(moonlight_network_driver PUBLIC
-  moonlight_platform_defaults
-  c
-  threadx
-  netxduo)
+if(DEFINED NETXDUO_CUSTOM_PORT)
+  add_library(moonlight_network_driver OBJECT
+    ${MOONLIGHT_SRC_DIR}/mnrs_network_driver.c)
+  target_link_libraries(moonlight_network_driver PUBLIC
+    moonlight_platform_defaults
+    c
+    threadx
+    netxduo)
+endif()
 
 function(target_add_moonlight_platform TARGET)
   target_link_libraries(${TARGET} PRIVATE moonlight_platform_common)
 endfunction()
 
 function(target_add_moonlight_network_driver TARGET)
+  if(NOT TARGET moonlight_network_driver)
+    message(FATAL_ERROR "moonlight_network_driver requires netxduo to be available in this build")
+  endif()
+
   target_link_libraries(${TARGET} PRIVATE moonlight_network_driver)
 endfunction()