Index: src/github.com/open-policy-agent/opa/Makefile
--- src/github.com/open-policy-agent/opa/Makefile.orig	2018-05-21 22:54:51.000000000 +0200
+++ src/github.com/open-policy-agent/opa/Makefile	2018-05-21 23:03:31.072277000 +0200
@@ -51,7 +51,7 @@
 	$(GO) generate
 
 build: generate
-	$(DISABLE_CGO) $(GO) build -o $(BIN) -ldflags $(LDFLAGS)
+	$(DISABLE_CGO) $(GO) build -x -o $(BIN) -ldflags $(LDFLAGS)
 
 image:
 	@$(MAKE) build GOOS=linux