*> But only it still does not work!*

With current system version all Ok:

#> sudo herd status mcron
Status of mcron:
  It is started.
  Running value is 298.
  It is enabled.
  Provides (mcron).
  Requires (user-processes).
  Conflicts with ().
  Will be respawned.

ps ax | grep mcron
  298 ?        Ssl    0:00
/gnu/store/9dl8l4krszdd1dhaw94da0nv28ap8dvp-mcron-1.1.1/bin/mcron
/gnu/store/vvf3frpvrffpchbd3xxlq8kmnxsywja6-mcron-job
/gnu/store/jv9asgfm82f6k7srwxy6bf9ckk70z270-mcron-job
/gnu/store/n4jbzmm6ihv70dd8j2ba9501hxs3q9ar-mcron-job
/gnu/store/2yql34psrh6iiyczs48hj7pw5bgv6gh6-mcron-job
  722 pts/0    S+     0:00 grep mcron