--- a/UnixPTYStream.st	Fri Dec 23 07:34:17 2016 +0100
+++ b/UnixPTYStream.st	Tue Dec 27 14:04:25 2016 +0100
@@ -242,7 +242,8 @@
                       fileDescriptors:execFdArray
                       fork:true
                       newPgrp:true
-                      inDirectory:aDirectory.
+                      inDirectory:aDirectory
+                      showWindow:nil.
                ]
                action:[:status |
                   status stillAlive ifFalse:[