anchor.diff:      (mkIf cfg.man.enable {
         environment.systemPackages = [ pkgs.man-db ];
         environment.pathsToLink = [ "/share/man" ];
  -      environment.extraOutputsToInstall = [ "man" ] ++ optional cfg.dev.enable "devman";
  +      environment.extraOutputsToInstall = activeManOutputs;
         environment.etc."man_db.conf".text =
           let
             manualCache = pkgs.runCommandLocal "man-cache" { } ''
  
positive.code:       ];
      };
  
  in
  
  {
  
negative.code:           name = "man-paths";
            paths = config.environment.systemPackages;
            pathsToLink = [ "/share/man" ];
            extraOutputsToInstall = activeManOutputs;
            ignoreCollisions = true;
          };
          defaultText = literalDocBook "all man pages in <option>config.environment.systemPackages</option>";
  