Commit 939edb1 reintroduced autoStart, but instead of creating a list of
units for the wantedBy list with optional it became a list of lists of
units.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
