anchor.diff:      description = "A GUI to produce PDFs or DjVus from scanned documents";
       homepage = http://gscan2pdf.sourceforge.net/;
       license = licenses.gpl3;
  -    maintainers = [ maintainers.pacien ];
  +    maintainers = with maintainers; [ pacien ];
     };
   }
  -
  
positive.code:   outputs = [ "out" "man" ];
  
    checkInputs = [
      xvfb_run
      hicolor-icon-theme
      imagemagick
      libtiff
      djvulibre
      poppler_utils
      ghostscript
      file
      pdftk
      unpaper
    ];
  
    checkPhase = ''
  
negative.code:       --prefix PATH : "${djvulibre}/bin" \
        --prefix PATH : "${poppler_utils}/bin" \
        --prefix PATH : "${ghostscript}/bin" \
        --prefix PATH : "${unpaper}/bin" \
        --prefix PATH : "${pdftk}/bin"
    '';
  
    enableParallelBuilding = true;
  