anchor.diff: -{ lib, stdenv, fetchurl, ruby }:
  +{ lib, stdenv, fetchurl }:
   
   let
   
  
positive.code:       # Backwards compatibility. Will remove eventually.
        mkdir -p $out/xml/xsl
        ln -s $dst $out/xml/xsl/docbook
  
        ln -sv $dst/epub/bin $out
        chmod +x $out/bin/dbtoepub
      '';
  
      meta = {
  
negative.code:       url = "mirror://sourceforge/docbook/${name}.tar.bz2";
        inherit sha256;
      };
  
      dontBuild = true;
  
  