Index: systemd-195/units/debug-shell.service.in
===================================================================
--- systemd-195.orig/units/debug-shell.service.in
+++ systemd-195/units/debug-shell.service.in
@@ -13,7 +13,7 @@ IgnoreOnIsolate=yes
 
 [Service]
 Environment=TERM=linux
-ExecStart=@sushell@
+ExecStart=/bin/bash -c '[ -x @sushell@ ] && exec @sushell@ || exec /bin/bash'
 Restart=always
 RestartSec=0
 StandardInput=tty