diff --git a/cheshire.mk b/cheshire.mk
index a97ac6d9..594c2d59 100644
--- a/cheshire.mk
+++ b/cheshire.mk
@@ -87,7 +87,7 @@ $(CHS_ROOT)/hw/newusb_regs/newusb_regs.hjson:
 
 # NewUSB registers
 $(CHS_ROOT)/hw/newusb_regs/newusb_reg_pkg.sv: $(CHS_ROOT)/hw/newusb_regs/newusb_regs.hjson
-	$(REGTOOL) -r $< --outdir $(dir $@) && rm -f $(CHS_ROOT)/hw/newusb_regs/newusb_regs.hjson
+	$(REGTOOL) -r $< --outdir $(dir $@)
 
 $(CHS_ROOT)/hw/newusb_regs/newusb_reg_top.sv: $(CHS_ROOT)/hw/newusb_regs/newusb_regs.hjson
 	$(REGTOOL) -r $< --outdir $(dir $@) && rm -f $(CHS_ROOT)/hw/newusb_regs/newusb_regs.hjson