Index: keyutils-1.5.9/Makefile
===================================================================
--- keyutils-1.5.9.orig/Makefile
+++ keyutils-1.5.9/Makefile
@@ -110,7 +110,7 @@ $(ARLIB): keyutils.o
 	$(AR) rcs $@ $<
 endif
 
-VCPPFLAGS	:= -DPKGBUILD="\"$(shell date -u +%F)\""
+VCPPFLAGS	:= -DPKGBUILD="\"no timestamp to avoid rebuilds\""
 VCPPFLAGS	+= -DPKGVERSION="\"keyutils-$(VERSION)\""
 VCPPFLAGS	+= -DAPIVERSION="\"libkeyutils-$(APIVERSION)\""