anchor.diff:            set -eu
             set -o pipefail
   
  -          export PATH="${activationBinPaths}:$PATH"
  +          export PATH="${activationBinPaths}"
   
             . ${./lib-bash/color-echo.sh}
   
  
positive.code:           pkgs.gnused
            pkgs.ncurses          # For `tput`.
            pkgs.nix
          ];
  
          activationScript = pkgs.writeScript "activation-script" ''
            #!${pkgs.stdenv.shell}
  
negative.code:     home.path = mkOption {
        internal = true;
        description = "The derivation installing the user packages.";
      };
  
      home.emptyActivationPath = mkOption {
        internal = true;
        default = false;
        type = types.bool;
        description = ''
          Whether the activation script should start with an empty
          <envvar>PATH</envvar> variable. When <literal>false</literal>
          then the user's <envvar>PATH</envvar> will be used.
        '';
      };
  
      home.activation = mkOption {
  