anchor.diff:      gobject-introspection
     ];
   
  -  buildInputs = [
  +  propagatedBuildInputs = [
       glib
       libsoup
  +    libxml2
     ];
   
     configureFlags = [
  
positive.code: stdenv.mkDerivation rec {
    pname = "rest";
    version = "0.8.1";
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  
negative.code: , pkg-config
  , glib
  , libsoup
  , libxml2
  , gobject-introspection
  , gnome
  }:
  