anchor.diff:      "--disable-gtk-doc"
       "--disable-gtk-doc-html"
       "--disable-gtk-doc-pdf"
  -    (enFlag "introspection" (gobject-introspection != null) "yes")
  +    "--${boolEn (gobject-introspection != null)}-introspection"
       "--disable-gcov"
       # gnome support only adds a dependency on obsolete libsoup-gnome
       "--without-gnome"
  
positive.code: { stdenv
  , fetchurl
  , intltool
  
  , glib
  , gobject-introspection
  
negative.code: }:
  
  let
    inherit (lib)
      boolEn;
  
    versionMajor = "0.8";
    versionMinor = "0";
    version = "${versionMajor}.${versionMinor}";
  in
  stdenv.mkDerivation rec {
    name = "rest-${version}";
  
    src = fetchurl {
      url = "mirror://gnome/sources/rest/${versionMajor}/${name}.tar.xz";
  