anchor.diff:        # modified by the write_{cd,net}_rules helpers called from
         # 75-cd-aliases-generator.rules and
         # 75-persistent-net-generator.rules.
  -      ln -s /var/lib/udev/rules.d/70-persistent-cd.rules $out/
  -      ln -s /var/lib/udev/rules.d/70-persistent-net.rules $out/
  +      ln -sv /var/lib/udev/rules.d/70-persistent-cd.rules $out/
  +      ln -sv /var/lib/udev/rules.d/70-persistent-net.rules $out/
       ''; # */
     };
   
  
positive.code:           ''
              echo "" > /proc/sys/kernel/hotplug
  
              mkdir -p /var/lib/udev/rules.d
  
              # Do the loading of additional stage 2 kernel modules.
              # Maybe this isn't the best place...
  
negative.code:       
        # 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 -sv $j $out/$(basename $j)
          done
        done
  
  