anchor.diff:          };
   	
   	environment = {
  -	  extraPackages = [ pkgs.pythonPackages.trac ];
  +	  extraPackages = [ pkgs.pythonPackages.trac pkgs.subversion ];
   	};
         };
         
  
positive.code:           nfsKernel = {
              enable = true;
              exports = ''
                /repos/trac 192.168.1.0/255.255.255.0(rw,no_root_squash)
              '';
            };    
          };
    
          environment = {
            extraPackages = [
              pkgs.subversion
            ];
          };
        };
  
      postgresql =
  
negative.code:  
          environment = {
  	  extraPackages = [
  	    pkgs.scrot
  	  ];
  	};
  