libxslt: Fix propagation of the libxml2 setup hook

pkgs/development/libraries/libxslt/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libxml2 }:
+{ stdenv, fetchurl, libxml2, findXMLCatalogs }:
 
 stdenv.mkDerivation rec {
   name = "libxslt-1.1.28";
@@ -10,6 +10,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libxml2 ];
 
+  propagatedBuildInputs = [ findXMLCatalogs ];
+
   patches = stdenv.lib.optionals stdenv.isSunOS [ ./patch-ah.patch ];
 
   configureFlags = [
@@ -21,11 +23,6 @@ stdenv.mkDerivation rec {
     "--without-debugger"
   ];
 
-  postInstall = ''
-    mkdir -p $out/nix-support
-    ln -s ${libxml2}/nix-support/setup-hook $out/nix-support/
-  '';
-
   meta = {
     homepage = http://xmlsoft.org/XSLT/;
     description = "A C library and tools to do XSL transformations";