984d9ebb56
`systemd.hideProcessInformation = true`, would break interactions requiring polkit arbitration such as initating poweroff/reboot as a normal user; the polkit daemon cannot be expected to make decisions about processes that don't exist as far as it is concerned. systemd-logind lacks the `sys_ptrace` capability and so needs to be part of the designated proc gid, even though it runs as root. Fixes https://github.com/NixOS/nixpkgs/issues/20948
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.