NixOS/nixos — pull request #51 by surr (2012-12-15 11:40:33+00:00)
Title: acpid ignores config files

I get these messages from acpid:
acpid: starting up with netlink and the input layer
acpid: skipping conf file /nix/store/8psyflaa9jdb5z0g8irbnzdh26gibn6r-acpi-events//power-button.conf
acpid: skipping conf file /nix/store/8psyflaa9jdb5z0g8irbnzdh26gibn6r-acpi-events//lid.conf
acpid: skipping conf file /nix/store/8psyflaa9jdb5z0g8irbnzdh26gibn6r-acpi-events//ac-power.conf
acpid: 0 rules loaded
So, I can't shutdown machine using power button.

I found similar issue in RH bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=575320