diff --git a/make/ghdl.mk b/make/ghdl.mk
index 2b7deaf..13e33b4 100644
--- a/make/ghdl.mk
+++ b/make/ghdl.mk
@@ -63,7 +63,6 @@ all:  analyze
 $(WORK_DIR):
 	mkdir -p $@
 	touch $(TARGET).gtkw
-	cp -n $(TARGET).gtkw $(BUILD_DIR)
 
 syntax: 
 	$(GHDL) -s $(GHDL_OPTS) $(SRCS)