anchor.diff:        
         # Add the udev rules from other packages.
         for i in ${toString cfg.packages}; do
  +        echo "Add rules for package $i"
           for j in $i/*/udev/rules.d/*; do
  -          ln -s $j $out/$(basename $j)
  +          ln -sv $j $out/$(basename $j)
           done
         done
   
  
positive.code:                 ${modprobe}/sbin/modprobe $i || true
              done
  
              mkdir -p /dev/.udev # !!! bug in udev?
            '';
  
          daemonType = "fork";
  
negative.code:       # modified by the write_{cd,net}_rules helpers called from
        # 75-cd-aliases-generator.rules and
        # 75-persistent-net-generator.rules.
        ln -sv /var/lib/udev/rules.d/70-persistent-cd.rules $out/
        ln -sv /var/lib/udev/rules.d/70-persistent-net.rules $out/
      ''; # */
    };
  
  