anchor.diff:  }:
   
   let
  +    inherit (stdenv) lib;
       buildClient = monolithic || client;
       buildCore = monolithic || enableDaemon;
   in
  
positive.code:     ++ edf client "WANT_QTCLIENT"
      ++ edf withKDE "WITH_KDE";
  
    preFixup =
      lib.optionalString enableDaemon ''
          wrapProgram "$out/bin/quasselcore" --suffix PATH : "${qtbase.bin}/bin"
      '' +
      lib.optionalString buildClient ''
          wrapProgram "$out/bin/quassel${lib.optionalString client "client"}" \
            --prefix GIO_EXTRA_MODULES : "${dconf}/lib/gio/modules"
      '';
  
    meta = with stdenv.lib; {
  
negative.code: let
    edf = flag: feature: [("-D" + feature + (if flag then "=ON" else "=OFF"))];
  
  in (if !buildClient then stdenv.mkDerivation else mkDerivation) rec {
    name = "quassel${tag}-${version}";
    version = "0.13.1";
  
  