title: How can I combine two lists in Nix?
body: <p>I've currently got a list defined as:</p>
  
  <pre><code>   environment.systemPackages = with pkgs; [
       acpi
       ag
       alacritty
       audacity
       awscli
       bash
       breeze-gtk
       cabal-install
      ];
  </code></pre>
  
  <p>How would I go about defining two lists and then merging them to set the <code>environment.systemPackages</code> value?</p>
  
  <p>I'd like to split the list so it's easier to manage groups of related packages.</p>