diff --git a/npc/CMakeLists.txt b/npc/CMakeLists.txt
index 61b1d09..c6f8612 100644
--- a/npc/CMakeLists.txt
+++ b/npc/CMakeLists.txt
@@ -40,7 +40,7 @@ foreach(TOPMODULE IN LISTS TOPMODULES)
   )
 
   add_custom_target(
-      ChiselBuild
+      ChiselBuild_${TOPMODULE}
       DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${TOPMODULE}/vsrc/${TOPMODULE}.v
   )