anchor.diff:  , glib
   , gnome-themes-standard
   , gtk_2
  +, gtk_3
   , libx11
   , libxfce4ui
   , libxfce4util
   , perlPackages
   , shared-mime-info
  -, xproto
  +, xorgproto
   }:
   
   let
  -  inherit (lib)
  -    boolEn;
  -
     channel = "0.12";
     version = "${channel}.0";
   in
  
positive.code:   name = "exo-${version}";
  
    src = fetchurl {
      url = "http://archive.xfce.org/src/xfce/exo/${channel}/${name}.tar.bz2";
      multihash = "QmTiBHtvFbXZq4Cb33gW5x3i4ia547sSYRu8YVrmR55Rgf";
      sha256 = "c4994f9bcb0e0c3e2f7c647d9715ed22ea5c9b091320916e15ca7255ebf39822";
    };
  
    nativeBuildInputs = [
  
negative.code:     glib
      gnome-themes-standard
      gtk_2
      gtk_3
      libx11
      libxfce4ui
      libxfce4util
      perlPackages.URI
      xorgproto
    ];
  
    configureFlags = [
      "--disable-maintainer-mode"
      "--enable-nls"
      "--enable-gio-unix"
      "--disable-gtk-doc"
      "--disable-gtk-doc-html"
      "--disable-gtk-doc-pdf"
  