When I specify a working direcotry in a unit file I would like to refer to it from the ExecStart section via a specifier i.e.
[Unit]
Description=A test daemon that says hello
[Service]
Type=oneshot
WorkingDirectory=/home/foo/scipts
ExecStart="%<<WORKING_DIRECTORY_SPECIFIER>>/echo_hello.sh"
RemainAfterExit=yes
Is this possible with Systemd and if it is not are there any work-arounds?