Joachim Fasting 4c41c412a0
nix gc service: fix use of startAt
`startAt = ""` as in `startAt = optionalString false ...` results
in an invalid timer unit (due to "" being promoted to a singleton
list and not filtered out).

Ref: c9941c4b5ef7acc1cb8d734acb383410d99c01ba
2016-10-23 17:56:49 +02:00
..
2016-04-22 03:58:08 +02:00
2016-10-22 22:03:45 +00:00
2016-09-27 15:35:02 +02:00
2016-10-23 17:56:49 +02:00
2016-10-21 23:31:50 +02:00