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