diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index 0b0fa86..4d67e5b 100644
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -558,3 +558,12 @@
         endif
     endif
 endif
+
+ifeq ($(TW_INCLUDE_REPACKTOOLS), true)
+    ifeq ($(wildcard external/magisk-prebuilt/Android.mk),)
+        $(warning Magisk repacking tools not found!)
+        $(warning Please place https://github.com/TeamWin/external_magisk-prebuilt)
+        $(warning into external/magisk-prebuilt)
+        $(error magiskboot prebuilts not present; exiting)
+    endif
+endif