Index: Math-Pari-2.01080607/Makefile.PL
--- Math-Pari-2.01080607/Makefile.PL.orig	2014-04-24 13:43:52.000000000 +0200
+++ Math-Pari-2.01080607/Makefile.PL	2014-04-27 10:28:42.227288809 +0200
@@ -25,12 +25,13 @@
 grep {/^pari_tgz=(.*?)[\/\\]?$/i	 and $parisrc = $1}	     @ARGV;
 grep {/^force_download$/i	 and $force_download = 1}    @ARGV;
 grep {/^parilib=(.*)$/i		 and $common::parilib = $1}  @ARGV;
+grep {/^parihdr=(.*)$/i		 and $common::parihdr = $1}  @ARGV;
 grep {/^version23_ok=(.*)$/i	 and $ok23 = $1}  @ARGV;
 
 # The REx should anchored-match versions to skip
 $common::skip_versions = $ok23 ? '2\.(?:[4-9]|\d\d+)\.' : '2\.(?:[3-9]|\d\d+)\.';
 
-@ARGV = grep !/^((machine|paridir|pari_tgz|parilib|version23_ok)=.*|configure|force_download)$/i, @ARGV;
+@ARGV = grep !/^((machine|paridir|pari_tgz|parilib|parihdr|version23_ok)=.*|configure|force_download)$/i, @ARGV;
 
 $paridir   = find_pari_dir() unless defined $paridir or $parisrc or $force_download;
 ($paridir, my @patch_rc) = download_and_patch_pari($parisrc, $force_download)
@@ -53,7 +54,7 @@
 EOP
 
 if ($common::parilib) {
-  $pari_version = '2001004';	# XXXX How to get a correct one?
+  $pari_version = '2003001';	# XXXX How to get a correct one?
   $define = '-DNO_HIGHLEVEL_PARI';
   print <<EOP;
 Trying to use existing PARI library (at $common::parilib)
@@ -179,7 +180,7 @@
 # This is done in Makefile in GP/PARI, and in paricfg.h without do_configure
 $define .= ' -DDL_DFLT_NAME=NULL' if $common::do_configure;
 
-my $extra_inc = extra_includes($paridir);
+my $extra_inc = $common::parihdr . " " . extra_includes($paridir);
 
 # See lib/ExtUtils/MakeMaker.pm for details of how to influence
 # the contents of the Makefile being created.