anchor.diff:                  build-users-group = nixbld
                   build-max-jobs = ${toString (config.nix.maxJobs)}
                   build-use-chroot = ${if config.nix.useChroot then "true" else "false"}
  -                build-chroot-dirs = /dev /dev/pts /proc /bin $(echo $extraPaths)
  +                build-chroot-dirs = /dev /dev/pts /proc /bin $(echo $extraPaths) ${builtins.toString config.nix.extraChrootPaths}
                   $extraOptions
                   END
                 '';
  
positive.code:           you should increase this value.
          '';
        };
        
      };
    };
  
  
negative.code:         description = "
            This option allows to append lines to nix.conf. 
          ";
        };
        
        extraChrootPaths = mkOption {
          default = [];
  	example = ["/var/dist"];
  	description = ''
  	  Extra paths to include in chroot. May be useful if you build
  	  from private repository mirrors to avoid extra checksumming 
  	  and copying to store.
  	'';
        };
  
        distributedBuilds = mkOption {
  