diff --git a/Makefile b/Makefile
index 985c6ff..c5d5b94 100644
--- a/Makefile
+++ b/Makefile
@@ -114,9 +114,10 @@ $(__Wl_clipboard):
 ### PHONY targets that a user would run ###
 .PHONY : all
 all:
-	@[[ -z "$(git submodule status | grep --quiet '^-')" ]] && \
+	ifneq ($(git submodule status | grep --quiet '^-' ; echo $$?), 0)
 		$(error "Git submodules have not been initialised. Please run: git \
 "submodule update --init")
+	endif
 	$(MAKE) build
 
 .PHONY : build