diff --git a/Makefile b/Makefile
index 343a451..140c173 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,7 @@
+SHELL := bash
+.SHELLFLAGS := -eu -o pipefail -c
+MAKEFLAGS += --warn-undefined-variables
+
 .DEFAULT_GOAL := test
 
 .PHONY: test