diff --git a/common.mk b/common.mk
index 9f3cf1e0..9223e295 100644
--- a/common.mk
+++ b/common.mk
@@ -161,9 +161,9 @@ define mfc_extra_anno_contents
 endef
 export mfc_extra_anno_contents
 export sfc_extra_low_transforms_anno_contents
-$(EXTRA_ANNO_FILE) $(MFC_EXTRA_ANNO_FILE) &: $(ANNO_FILE)
+$(FINAL_ANNO_FILE) $(MFC_EXTRA_ANNO_FILE) &: $(ANNO_FILE)
 	echo "$$mfc_extra_anno_contents" > $(MFC_EXTRA_ANNO_FILE)
-	jq -s '[.[][]]' $(ANNO_FILE) $(MFC_EXTRA_ANNO_FILE) > $(EXTRA_ANNO_FILE)
+	jq -s '[.[][]]' $(ANNO_FILE) $(MFC_EXTRA_ANNO_FILE) > $(FINAL_ANNO_FILE)
 
 .PHONY: firrtl
 firrtl: $(FIRRTL_FILE) $(FINAL_ANNO_FILE)
@@ -193,10 +193,6 @@ else
 	echo "$(MFC_BASE_LOWERING_OPTIONS),disallowPackedArrays" > $@
 endif
 
-$(FINAL_ANNO_FILE): $(EXTRA_ANNO_FILE)
-	cat $(EXTRA_ANNO_FILE) > $@
-	touch $@
-
 $(SFC_MFC_TARGETS) &: $(TAPEOUT_CLASSPATH_TARGETS) $(FIRRTL_FILE) $(FINAL_ANNO_FILE) $(MFC_LOWERING_OPTIONS)
 	rm -rf $(GEN_COLLATERAL_DIR)
 	$(call run_jar_scala_main,$(TAPEOUT_CLASSPATH),tapeout.transforms.GenerateModelStageMain,\
diff --git a/variables.mk b/variables.mk
index cfb29a61..e0dd1236 100644
--- a/variables.mk
+++ b/variables.mk
@@ -170,7 +170,6 @@ TAPEOUT_CLASSPATH_TARGETS ?= $(subst :, ,$(TAPEOUT_CLASSPATH))
 # chisel generated outputs
 FIRRTL_FILE ?= $(build_dir)/$(long_name).fir
 ANNO_FILE   ?= $(build_dir)/$(long_name).anno.json
-EXTRA_ANNO_FILE ?= $(build_dir)/$(long_name).extra.anno.json
 CHISEL_LOG_FILE ?= $(build_dir)/$(long_name).chisel.log
 
 # chisel anno modification output