Build time does not create new version

@@ -21,8 +21,7 @@ $(LIBRARY): $(SOURCES)
 	go install $(PACKAGE)
 
 .version:
-	-@printf "%s\n%s\n%s" \
-		"$(VERSION)" "$(REVISION)" "$(BUILDTIME)" >$@.new
+	-@printf "%s\n%s\n%s" "$(VERSION)" "$(REVISION)" >$@.new
 	-@diff $@ $@.new >/dev/null 2>&1 && rm $@.new || mv $@.new $@
 
 version.go: version.go.m4 .version