--- a/debian/rules	2019-07-17 09:50:20.599066174 -0300
--- b/debian/rules	2019-07-17 10:01:13.302028995 -0300
@@ -17,7 +17,7 @@
 	./configure
 
 override_dh_auto_build:
-	make BUILD_DATE="$(shell date -R -d @$(SOURCE_DATE_EPOCH))"
+	make BUILD_DATE="$(shell date -u -R -d @$(SOURCE_DATE_EPOCH))"
 
 override_dh_auto_install:
 	mkdir -p $(OCAMLFIND_DESTDIR)