anchor.diff:  , libgsf
   , libxml2
   , pango
  -, vala
  +, rustPackages
   }:
   
   let
     inherit (lib)
       boolEn;
   
  -  channel = "2.40";
  -  version = "${channel}.20";
  +  channel = "2.44";
  +  version = "${channel}.13";
   in
   stdenv.mkDerivation rec {
     name = "librsvg-${version}";
  
positive.code:   passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        sha256Url = "https://download.gnome.org/sources/librsvg/${channel}/"
          + "${name}.sha256sum";
        inherit (src) urls outputHash outputHashAlgo;
      };
    };
  
  
negative.code: , fetchurl
  , lib
  
  , cairo
  , fontconfig
  , freetype
  , gdk-pixbuf
  , glib
  , gobject-introspection
  