diff --git a/zig-impl/makefile b/zig-impl/makefile
index beacc93..e3e1181 100644
--- a/zig-impl/makefile
+++ b/zig-impl/makefile
@@ -1,7 +1,7 @@
 all:
 
 ZIGC = zig
-ZIGOPTS = -OReleaseSmall
+ZIGOPTS = -OReleaseSmall $(ZIGUSROPTS)
 
 c: src/send-msg.zig
 	$(ZIGC) build-exe $(ZIGOPTS) $^
@@ -13,7 +13,10 @@ m: src/main.zig
 	$(ZIGC) build-exe $(ZIGOPTS) $^
 
 t: src/main.zig
-	$(ZIGC) test $^
+	$(ZIGC) test $(ZIGOPTS) $^
 
 d: src/main.zig
 	$(ZIGC) build-exe $(ZIGOPTS) -freference-trace $^
+
+o: $(SRC)
+	$(ZIGC) test $(ZIGOPTS) $^