diff --git a/Makefile b/Makefile
index 07d89ea..838e3ce 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ cross-build:
 	@gox\
 		-os="linux darwin windows"\
 		-arch="386 amd64"\
-		-ldflags="$(COMMIT)"\
+		$(BUILD_FLAGS)\
 		-output "dist/isbn-gen_{{.OS}}_{{.Arch}}"
 
 install: