diff --git a/mac/Makefile b/mac/Makefile
index f13153492..e3dc8c188 100644
--- a/mac/Makefile
+++ b/mac/Makefile
@@ -6,7 +6,7 @@ all: build
 dist: build diskimage upload cleanup
 
 build:
-	rsync -avn ` sw_vers -productVersion | sed -e 's/^\(10\.[0-9]*\)\..*$/\1/' `/ ./
+	rsync -av ` sw_vers -productVersion | sed -e 's/^\(10\.[0-9]*\)\..*$$/\1/' `/ ./
 	python setup.py py2app --no-chdir
 
 diskimage: