From 147c963d5954429b7a8be179a8e304278a6b2602 Mon Sep 17 00:00:00 2001
From: Neale Pickett <neale@woozle.org>
Date: Wed, 19 Apr 2023 20:06:38 -0600
Subject: [PATCH] Fix makefile

---
 Makefile | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 4d13e4a..f3fb7ac 100644
--- a/Makefile
+++ b/Makefile
@@ -8,10 +8,13 @@ install: build/uilleann.ino.uf2
 	./install.sh $< $(UF2_MOUNT)
 
 # uf2conv.py is covered by an MIT license.
-build/uf2conv.py:
+build/uf2conv.py: build/uf2families.json
 	mkdir -p build
-	curl -L https://raw.githubusercontent.com/microsoft/uf2/master/utils/uf2conv.py > $@
+	curl -L https://raw.githubusercontent.com/microsoft/uf2/master/utils/$(@F) > $@
 	chmod +x $@
+build/uf2families.json:
+	mkdir -p build
+	curl -L https://raw.githubusercontent.com/microsoft/uf2/master/utils/$(@F) > $@
 
 %.uf2: %.bin build/uf2conv.py
 	build/uf2conv.py -b 0x4000 -c -o $@ $<