diff --git a/Makefile.docker b/Makefile.docker
index 293d847..9632368 100644
--- a/Makefile.docker
+++ b/Makefile.docker
@@ -1,12 +1,15 @@
 all:
 	docker run -v $$PWD:/usr/src/app -it portal64 make
 
-image:
-	docker build -t portal64 .
+debug:
+	docker run -v $$PWD:/usr/src/app -it PORTAL64_WITH_GFX_VALIDATOR=1 portal64 make
 
 convert_all_png:
 	docker run -v $$PWD:/usr/src/app -it portal64 make convert_all_png
 
+image:
+	docker build -t portal64 .
+
 bash:
 	docker run -v $$PWD:/usr/src/app -it portal64 bash