anchor.diff:                  If set, Nix will perform builds in a sandboxed environment that it
                   will set up automatically for each build. This prevents impurities
                   in builds by disallowing access to dependencies outside of the Nix
  -                store by using network and mount namespaces in a chroot environment.
  -                This is enabled by default even though it has a possible performance
  -                impact due to the initial setup time of a sandbox for each build. It
  +                store by using network and mount namespaces in a chroot environment. It
                   doesn't affect derivation hashes, so changing this option will not
                   trigger a rebuild of packages.
                 '';
  
positive.code:       name = "nix.conf";
        text = ''
          # WARNING: this file is generated from the nix.* options in
          # your NixOS configuration, typically
          # /etc/nixos/configuration.nix.  Do not edit it!
          ${mkKeyValuePairs cfg.settings}
          ${cfg.extraOptions}
        '';
  
negative.code:           };
          };
          default = { };
          description = ''
            Configuration for Nix, see
            <link xlink:href="https://nixos.org/manual/nix/stable/#sec-conf-file"/>
            for avalaible options.
            The value declared here will be translated directly to the key-value pairs Nix expects.
            </para>
            <para>
            Nix configurations defined under <option>nix.*</option> will be translated and applied to this
  