anchor.diff:  
   let
   
  -  _enableDitaaFilter = enableExtraPlugins || enableDitaaFilter;
  +  _enableDitaaFilter = (enableExtraPlugins && enableJava) || enableDitaaFilter;
     _enableMscgenFilter = enableExtraPlugins || enableMscgenFilter;
     _enableDiagFilter = enableExtraPlugins || enableDiagFilter;
     _enableQrcodeFilter = enableExtraPlugins || enableQrcodeFilter;
  
positive.code:   docbook_xml_dtd_45 != null &&
    docbook5_xsl != null &&
    docbook_xsl != null &&
    fop != null &&
  # TODO: Package this:
  #  epubcheck != null &&
    gnused != null &&
  
negative.code:         -e "s|^ASCIIDOC =.*|ASCIIDOC = '$out/bin/asciidoc'|" \
          -e "s|^XSLTPROC =.*|XSLTPROC = '${libxslt.bin}/bin/xsltproc'|" \
          -e "s|^DBLATEX =.*|DBLATEX = '${dblatexFull}/bin/dblatex'|" \
          ${optionalString enableJava ''-e "s|^FOP =.*|FOP = '${fop}/bin/fop'|"''} \
          -e "s|^W3M =.*|W3M = '${w3m}/bin/w3m'|" \
          -e "s|^LYNX =.*|LYNX = '${lynx}/bin/lynx'|" \
          -e "s|^XMLLINT =.*|XMLLINT = '${libxml2.bin}/bin/xmllint'|" \
  