diff --git a/contrib/summerschool/foods/Makefile b/contrib/summerschool/foods/Makefile
index 5738bc281..8d92fe3f7 100644
--- a/contrib/summerschool/foods/Makefile
+++ b/contrib/summerschool/foods/Makefile
@@ -4,5 +4,8 @@ all:: Foods.pgf
 Foods.pgf: Foods???.gf
 	gf -make -s -optimize-pgf Foods???.gf
 
+exper: Foods???.gf
+	gf -make -s -optimize-pgf Foods???.gf FoodsThai.gf
+
 clean:
 	rm -rf *.gfo Foods.pgf