/usr/bin/slurp: invalid option -- '-'
Usage: slurp [options...]

  -h           Show help message and quit.
  -d           Display dimensions of selection.
  -b #rrggbbaa Set background color.
  -c #rrggbbaa Set border color.
  -s #rrggbbaa Set selection color.
  -B #rrggbbaa Set option box color.
  -F s         Set the font family for the dimensions.
  -w n         Set border weight.
  -f s         Set output format.
  -o           Select a display output.
  -p           Select a single point.
  -r           Restrict selection to predefined boxes.
  -a w:h       Force aspect ratio.