anchor.diff:  
       mkdir -p $out/var/lib/hp
       cp ${hplipState} $out/var/lib/hp/hplip.state
  -
  -    mkdir -p $out/etc/sane.d/dll.d
  -    mv $out/etc/sane.d/dll.conf $out/etc/sane.d/dll.d/hpaio.conf
   
       rm $out/etc/udev/rules.d/56-hpmud.rules
     '';
  
positive.code:       --with-systraydir=$out/xdg/autostart
        --with-mimedir=$out/etc/cups
        --enable-policykit
      "
  
      export makeFlags="
  
negative.code:   prePatch = ''
      # HPLIP hardcodes absolute paths everywhere. Nuke from orbit.
      find . -type f -exec sed -i \
        -e s,/etc/hp,$out/etc/hp,g \
        -e s,/etc/sane.d,$out/etc/sane.d,g \
        -e s,/usr/include/libusb-1.0,${libusb1.dev}/include/libusb-1.0,g \
        -e s,/usr/share/hal/fdi/preprobe/10osvendor,$out/share/hal/fdi/preprobe/10osvendor,g \
        -e s,/usr/lib/systemd/system,$out/lib/systemd/system,g \
        -e s,/var/lib/hp,$out/var/lib/hp,g \
        {} +
    '';
  
  