anchor.diff:    environment.systemPackages = with default; with channels;[
   
       # dotfiles
  -    local-dotfiles.xvapx
  -    local-dotfiles.nixos
  +    dotfiles.xvapx
  +    dotfiles.nixos
   
       # dev
       automake
  
positive.code:     nixos-unstable-small.retroarch                      # multi-system
      nixos-unstable-small.dolphin                        # nintendo gamecube, wii
      nixos-unstable-small.pcsx2                          # sony playstation 2
      (nixos-unstable-small.wine.override {              # microsoft windows
        wineRelease = "staging";
        wineBuild = "wineWow";
      })
  
negative.code:       options = "--delete-older-than 20d";
      };
      # Use sandbox to build packages
      useSandbox = true;
      maxJobs = lib.mkDefault 4;
      buildCores = 0;
      readOnlyStore = true;
  