diff --git a/CMakeLists.txt b/CMakeLists.txt
index 17f49519..978ceac8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -757,23 +757,24 @@ if(NINTENDO_3DS)
   )
 
   ctr_create_3dsx(isle SMDH isle.smdh)
+  if(BANNERTOOL AND MAKEROM)
+    add_custom_command(
+      OUTPUT "isle.bnr"
+      COMMAND "${BANNERTOOL}" makebanner -i "../ISLE/res/3ds/banner.png" -a "../ISLE/res/3ds/banner.wav" -o "isle.bnr"
+      DEPENDS "../ISLE/res/3ds/banner.png" "../ISLE/res/3ds/banner.wav"
+      VERBATIM
+    )
 
-  add_custom_command(
-    OUTPUT "isle.bnr"
-    COMMAND "${BANNERTOOL}" makebanner -i "../ISLE/res/3ds/banner.png" -a "../ISLE/res/3ds/banner.wav" -o "isle.bnr"
-    DEPENDS "../ISLE/res/3ds/banner.png" "../ISLE/res/3ds/banner.wav"
-    VERBATIM
-  )
-
-  add_custom_command(
-    OUTPUT "isle.cia"
-    COMMAND "${MAKEROM}" -f cia -exefslogo -o "isle.cia" -rsf "../ISLE/res/3ds/template.rsf" -major "${CMAKE_PROJECT_VERSION_MAJOR}" -minor "${CMAKE_PROJECT_VERSION_MINOR}" -micro 0 -icon "isle.smdh" -banner "isle.bnr" -elf "isle.elf"
-    DEPENDS "ISLE/res/3ds/template.rsf" "isle.smdh" "isle.bnr"
-    COMMENT "Building CIA executable target isle.cia"
-    VERBATIM
-  )
-  add_custom_target("isle_cia" ALL DEPENDS "isle.cia" isle)
+    add_custom_command(
+      OUTPUT "isle.cia"
+      COMMAND "${MAKEROM}" -f cia -exefslogo -o "isle.cia" -rsf "../ISLE/res/3ds/template.rsf" -major "${CMAKE_PROJECT_VERSION_MAJOR}" -minor "${CMAKE_PROJECT_VERSION_MINOR}" -micro 0 -icon "isle.smdh" -banner "isle.bnr" -elf "isle.elf"
+      DEPENDS "ISLE/res/3ds/template.rsf" "isle.smdh" "isle.bnr"
+      COMMENT "Building CIA executable target isle.cia"
+      VERBATIM
+    )
 
+    add_custom_target("isle_cia" ALL DEPENDS "isle.cia" isle)
+  endif()
   install(FILES "$<TARGET_FILE_DIR:isle>/isle.3dsx" DESTINATION "${CMAKE_INSTALL_BINDIR}")
   install(FILES "$<TARGET_FILE_DIR:isle>/isle.cia" DESTINATION "${CMAKE_INSTALL_BINDIR}")
 endif()