anchor.diff:          --param man.output.base.dir "'$out/share/man/'" \
           --param man.endnotes.are.numbered 0 \
           --param man.break.after.slash 1 \
  -        --stringparam target.database.document "${olinkDB}/olinkdb.xml" \
           ${docbook5_xsl}/xml/xsl/docbook/manpages/docbook.xsl \
           ./man-pages.xml
       '';
  
positive.code:       dst=$out/share/doc/nixos
        mkdir -p $dst
        xmllint --xinclude manual.xml | dblatex -o $dst/manual.pdf - \
          -P target.database.document="${olinkDB}/olinkdb.xml" \
          -P doc.collab.show=0 \
          -P latex.output.revhistory=0
  
  
negative.code:       </toc>
      '';
  
  in rec {
  
    # The NixOS options in JSON format.
  