Forgot a call to run() during the adduser.conf modification.

tos-packaging/package.class.php

@@ -26,7 +26,8 @@ class Package extends \Robo\Tasks
              ->run();
         $this->taskReplaceInFile($opts['prefix'].'/etc/adduser.conf')
              ->from('DSHELL=/bin/bash')
-             ->to('DSHELL=/usr/bin/zsh');
+             ->to('DSHELL=/usr/bin/zsh')
+             ->run();
     }
     /**
      * Removes the package