use  #!/usr/bin/env bash
for portability
diff --git a/releng.control/ant.sh b/releng.control/ant.sh
index 778663b..ceaf1ee 100644
--- a/releng.control/ant.sh
+++ b/releng.control/ant.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 # remember to leave no slashes on commonVariations in source command,
 # so that users path is used to find it (first). But, path on