anchor.diff:  sane-backends,
   rpm, cpio,
   getopt,
  -patchelf, gcc
  +patchelf, autoPatchelfHook, gcc
   }:
   
   let common_meta = {
  
positive.code:       };
  
      meta = common_meta // { description = "iscan esci s80 plugin for "+passthru.hw; };
    };
  };
  in
  
negative.code:     cp backend/epkowa.conf $out/etc/sane.d
      echo "epkowa" > $out/etc/sane.d/dll.conf
      ln -s ${iscan-data}/share/iscan-data $out/share/iscan-data
      mkdir -p $out/lib/iscan
      ln -s ${plugins.network}/lib/iscan/network $out/lib/iscan/network
      '';
    postFixup = ''
      # iscan-registry is a shell script requiring getopt
  