anchor.diff:  let
   
     inherit (pkgs) cups;
  -
  -  logDir = "/var/log/cups";
   
     cfg = config.services.printing;
   
  
positive.code: 
          SetEnv PATH ${bindir}/lib/cups/filter:${bindir}/bin:${bindir}/sbin
  
          AccessLog ${logDir}/access_log
          ErrorLog ${logDir}/error_log
          PageLog ${logDir}/page_log
  
          TempDir ${cfg.tempDir}
  
  
negative.code:         preStart =
            ''
              mkdir -m 0755 -p /etc/cups
              mkdir -m 0700 -p /var/cache/cups
              mkdir -m 0700 -p /var/spool/cups
              mkdir -m 0755 -p ${cfg.tempDir}
  