2024
Vimjoyer - Modularize NixOS and Home Manager | Great Practices of 8:06
    https://www.youtube.com/watch?v=vYc6IzKvAJQ
    https://github.com/vimjoyer/modularize-video

    # module1.nix
    module1.enable = lib.mkOverride 1000 false
    # module2.nix
    module1.enable = lib.mkOverride 900 true
    # aliases
    lib.mkDefault            = mkOverride 1000;
    lib.mkOptionDefault      = mkOverride 1500;
    lib.mkImageMediaOverride = mkOverride 60;
    lib.mkForce              = mkOverride 50;
    lib.mkVMOverride         = mkOverride 10;