From 80d5c2f420e30982360cd7398e63898e05111c9f Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Wed, 20 Mar 2019 23:29:35 +0000
Subject: [PATCH] preview png, actually make it a png

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 29f09bc..97f112b 100644
--- a/Makefile
+++ b/Makefile
@@ -142,7 +142,7 @@ minprintable-%.ps: $(BOARDDEPS)
 	./generate-board -Xp$*,bPrintableAll faces.plag input-graph $o
 
 %-preview.png: %.pdf Makefile
-	gm convert -geometry 50% $< $@.tmp && $i
+	gm convert -geometry 50% $< png:$@.tmp && $i
 
 boundings-%.ps: $(BOARDDEPS)
 	./generate-board -XB$* faces.plag input-graph $o
-- 
2.30.2