698388bc61
This change was only a temporary workaround and isn't required anymore,
since /etc/systemd/system/system.slice should not be present on any
recent NixOS system (which makes this change a no-op).
This reverts commit 7098b0fcdf.
*** 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.