The linker should continue with building the fastfile if the asset list is empty and the map type isn't NONE.

src/Linker/Linker.cpp

@@ -1,5 +1,4 @@
 #include "Linker.h"
-
 #include "LinkerArgs.h"
 #include "LinkerPaths.h"
 #include "ObjContainer/SoundBank/SoundBankWriter.h"
@@ -330,7 +329,7 @@ class LinkerImpl final : public Linker
 
             PathGameContext gameContext(paths, projectName, zoneDefinition->m_game);
 
-            if (!zoneDefinition->m_assets.empty())
+            if (!zoneDefinition->m_assets.empty() || zoneDefinition->m_map_type != ZoneDefinitionMapType::NONE)
             {
                 if (!BuildFastFile(paths, projectName, targetName, *zoneDefinition))
                     return false;