diff --git a/ion/src/simulator/web/Makefile b/ion/src/simulator/web/Makefile
index 08177b0ac..b31be6f0b 100644
--- a/ion/src/simulator/web/Makefile
+++ b/ion/src/simulator/web/Makefile
@@ -29,7 +29,7 @@ DEFAULT = $(BUILD_DIR)/simulator.zip
 $(BUILD_DIR)/simulator%zip: $(BUILD_DIR)/epsilon%packed.js
 	@rm -rf $(basename $@)
 	@mkdir -p $(basename $@)
-	@cp $^ $(basename $@)/epsilon.official.packed.js
+	@cp $^ $(basename $@)/epsilon.js
 	@cp ion/src/simulator/assets/background.jpg $(basename $@)/
 	@cp ion/src/simulator/web/simulator.html $(basename $@)/
 	$(call rule_label,ZIP)