anchor.diff:  
     configureFlags = [
       "--enable-largefile"
  -    "--enable-introspection"
  +    "--${boolEn (gobject-introspection != null)}-introspection"
       "--enable-nls"
       "--disable-gtk-doc"
       "--disable-gtk-doc-html"
  
positive.code:     #"--disable-alpm"
      "--disable-man"
      "--enable-dep11"
    ];
  
    meta = with stdenv.lib; {
  
negative.code: , util-linux_lib
  }:
  
  let
    inherit (stdenv.lib)
      boolEn;
  in
  stdenv.mkDerivation rec {
    name = "appstream-glib-0.6.3";
  
    src = fetchurl {
      url = "https://people.freedesktop.org/~hughsient/appstream-glib/"
        + "releases/${name}.tar.xz";
      sha256 = "3ec355c950b86cd792b6e396a5a4a72487999e300fcacf7466a663974ec4ad24";
    };
  
    nativeBuildInputs = [
  