anchor.diff:  
   let
     inherit (stdenv.lib)
  -    enFlag
  -    wtFlag;
  +    boolEn
  +    boolWt;
   
     source = (import ./sources.nix { })."${channel}";
   in
  
positive.code: 
    src = fetchurl {
      url = "mirror://gnome/sources/at-spi2-core/${channel}/${name}.tar.xz";
      sha256Url = "mirror://gnome/sources/at-spi2-core/${channel}/"
        + "${name}.sha256sum";
      inherit (source) sha256;
    };
  
  
negative.code: 
    configureFlags = [
      "--enable-nls"
      "--${boolEn (xorg != null)}-x11"
      # xevie is deprecated/broken since xorg-1.6/1.7
      "--disable-xevie"
      "--${boolEn (gobject-introspection != null)}-introspection"
      "--disable-gtk-doc"
      "--disable-gtk-doc-html"
      "--disable-gtk-doc-pdf"
      "--${boolWt (xorg != null)}-x"
      "--with-dbus-daemondir=/run/current-system/sw/bin/"
    ];
  
    passthru = {
      srcVerification = fetchurl {
        inherit (src)
          outputHash
          outputHashAlgo
          urls;
        sha256Url = "https://download.gnome.org/sources/at-spi2-core/"
          + "${channel}/${name}.sha256sum";
        failEarly = true;
      };
    };
  
    meta = with stdenv.lib; {
      description = "D-Bus accessibility specifications and registration daemon";
  