Description of problem:
zeitgeist-fts.service contains ExecStart=@libexecdir@/zeitgeist-fts

Version-Release number of selected component (if applicable):
zeitgeist-1.0-2.fc26.x86_64

How reproducible:
Use fedora; check /var/log/messages every once in a while

Steps to Reproduce:
1. grep zeitgeist /var/log/messages

Actual results:
May  4 15:34:35 s2 zeitgeist-daemon[3205]: #033[31m[13:34:35.360458 WARNING]#033[0m zeitgeist-daemon.vala:454: The connection is closed
May  4 15:35:23 s2 dbus-daemon[12870]: [session uid=500 pid=12870] Activation via systemd failed for unit 'zeitgeist-fts.service': Unit zeitgeist-fts.service is not loaded properly: Invalid argument.
May  4 15:35:23 s2 systemd[12837]: /usr/lib/systemd/user/zeitgeist-fts.service:7: Executable path is not absolute, ignoring: @libexecdir@/zeitgeist-fts
May  4 15:35:23 s2 zeitgeist-daemon[13334]: #033[31m[13:35:23.508286 WARNING]#033[0m zeitgeist-daemon.vala:127: Unable to parse version info!
May  4 15:35:23 s2 zeitgeist-daemon[13334]: #033[31m[13:35:23.508581 WARNING]#033[0m zeitgeist-daemon.vala:127: Unable to parse version info!
May  4 15:35:23 s2 systemd[12837]: zeitgeist-fts.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
May  4 15:35:23 s2 zeitgeist-daemon[13334]: #033[31m[13:35:23.694365 CRITICAL]#033[0m file ext-fts.c: line 756: unexpected error: Error calling StartServiceByName for org.gnome.zeitgeist.SimpleIndexer: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Unit zeitgeist-fts.service is not loaded properly: Invalid argument. (g-dbus-error-quark, 16)
May  4 15:35:23 s2 zeitgeist-daemon[13334]: #033[31m[13:35:23.694628 WARNING]#033[0m zeitgeist-daemon.vala:127: Unable to parse version info!

I.e.: a lot of lines about a thing that is simply a syntax error in the service file which has a line:

zeitgeist-fts.service contains ExecStart=@libexecdir@/zeitgeist-fts

I'd guess that @libexecdir@ should be an actual path like /usr/libexec ?

Expected results:
No such logging in /var/log/messages

Additional info:
.