--- a/Makefile	Mon Jul 23 13:26:22 2012 -0700
+++ b/Makefile	Mon Jul 23 15:12:22 2012 -0700
@@ -6,7 +6,7 @@
 	@bash -c "REMOTE_REV=$$(hg id -i http://svgwg.org/hg/svg2-tools); [ \$$? = 0 -o \"\$$REMOTE_REV\" != \"\" ] || exit 0; LOCAL_REV=$$(hg id -i ../svg2-tools); [ \"\$$LOCAL_REV\" = \"\$$REMOTE_REV\" -o \"\$$LOCAL_REV\" = \"\$$REMOTE_REV\"+ ] || (echo \"You must update your svg2-tools repository! (Remote repository has revision \$$REMOTE_REV, but you are at \$$LOCAL_REV.)\"; exit 1)"
 
 all :
-	$(MAKE) -C master/images/implnote/arcs/
+	[ -f /usr/bin/cygpath.exe ] || $(MAKE) -C master/images/implnote/arcs/
 	@../svg2-tools/build.py
 
 pdf : all