diff --git a/mpackage.sh b/mpackage.sh
index 58be2b1..564abff 100755
--- a/mpackage.sh
+++ b/mpackage.sh
@@ -197,7 +197,9 @@ gen_setup()
 		sed -e 's#@sysroot@#'"$mb_defroot"'#g' \
 		    -e 's#@product@#'"$mb_product"'#g' \
 		   $f  >  $f.tmp        || exit 2
-		mv $f.tmp $f            || exit 2
+
+		cat $f.tmp > $f         || exit 2
+		rm $f.tmp               || exit 2
 	done
 }