How can I combine two lists in Nix?

Question

I've currently got a list defined as:

   environment.systemPackages = with pkgs; [
     acpi
     ag
     alacritty
     audacity
     awscli
     bash
     breeze-gtk
     cabal-install
    ];

How would I go about defining two lists and then merging them to set the environment.systemPackages value?

I'd like to split the list so it's easier to manage groups of related packages.

Answer 1

From the Nix manual.

The ++ list concatenation operator:

nix-repl> [1 2 3]  ++ [5 6]
[ 1 2 3 5 6 ]

Code example:

let
  unstable = import <unstable> {
    config = config.nixpkgs.config; 
  };
  examplePkgs = with pkgs; [
    bash
  ];
in
{

   environment.systemPackages = with pkgs; [
     google-chrome
   ]
   ++ examplePkgs;