diff --git a/Makefile.in b/Makefile.in
index 11982a96..ea52c267 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -378,6 +378,7 @@ stamps/build-dejagnu: $(srcdir)/riscv-dejagnu
 	cd $(notdir $@) && $</configure \
 		--prefix=$(INSTALL_DIR)
 	$(MAKE) -C $(notdir $@)
+	date > $@
 
 check-gdb-newlib: stamps/build-gcc-newlib-stage2 stamps/build-dejagnu
 	PATH="$(INSTALL_DIR)/bin:$(PATH)" DEJAGNULIBS="$(srcdir)/riscv-dejagnu" $(MAKE) -C build-binutils-newlib check-gdb "RUNTESTFLAGS=--target_board=riscv-sim"