From 7ad9bed80831dd47fb1da75d72a3d075478766d5 Mon Sep 17 00:00:00 2001
From: Hamish Coleman <hamish@zot.org>
Date: Mon, 17 Aug 2020 08:15:18 +0100
Subject: [PATCH] Provide a better error message than git does, if we are not
 running in a proper checkout

---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index d7ffddc..d051552 100644
--- a/Makefile
+++ b/Makefile
@@ -293,6 +293,7 @@ endef
 	qemu-system-x86_64 $(QEMU_OPTIONS) -hda $<
 
 mec-tools/Makefile:
+	@[ -e .git ] || (echo ERROR: This must be run on a git clone of the repository; false)
 	git submodule update --init --remote
 
 mec-tools/mec_encrypt: mec-tools/Makefile