1c2e27e4d5
In some cases like we've noticed in https://github.com/NixOS/nixpkgs/issues/76169, having duplicate packages in systemd.packages like ``` systemd.packages = [ gnome-shell gnome-shell gnome-session ]; ``` breaks. Here we use an associative array to ensure no duplicate paths when we symlink all the units listed in systemd.packages.
*** 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.