diff --git a/emulator/Makefrag-verilator b/emulator/Makefrag-verilator
index 8aef2e9e..ff61405b 100644
--- a/emulator/Makefrag-verilator
+++ b/emulator/Makefrag-verilator
@@ -14,12 +14,12 @@ $(FIRRTL):
 
 .SECONDARY: $(firrtl) $(firrtl_debug) $(verilog) $(verilog_debug)
 
-$(firrtl) $(params_file) $(generated_dir)/%.$(CONFIG).d: $(chisel_srcs)
+$(generated_dir)/%.$(CONFIG).fir $(generated_dir)/%.$(CONFIG).prm $(generated_dir)/%.$(CONFIG).d: $(chisel_srcs)
 	mkdir -p $(dir $@)
 	cd $(base_dir) && $(SBT) "run $(PROJECT) $(MODEL) $(CONFIG) --targetDir $(generated_dir)"
 	mv $(generated_dir)/$(MODEL).fir $(generated_dir)/$(MODEL).$(CONFIG).fir
 
-$(firrtl_debug) $(params_file_debug): $(chisel_srcs)
+$(generated_dir_debug)/%.$(MODEL).$(CONFIG).fir $(generated_dir_debug)/%.$(CONFIG).prm $(generated_dir_debug)/%.$(CONFIG).d: $(chisel_srcs)
 	mkdir -p $(dir $@)
 	cd $(base_dir) && $(SBT) "run $(PROJECT) $(MODEL) $(CONFIG) --targetDir $(generated_dir_debug)"
 	mv $(generated_dir_debug)/$(MODEL).fir $(generated_dir_debug)/$(MODEL).$(CONFIG).fir