Index: perl-5.8.8/lib/ExtUtils/MM_Unix.pm
===================================================================
--- perl-5.8.8.orig/lib/ExtUtils/MM_Unix.pm	2007-05-30 15:16:47.000000000 +1000
+++ perl-5.8.8/lib/ExtUtils/MM_Unix.pm	2007-05-30 15:18:12.000000000 +1000
@@ -1597,6 +1597,11 @@
 	$self->{PERL_LIB}     ||= $Config{privlibexp};
 	$self->{PERL_ARCHLIB} ||= $Config{archlibexp};
 	$self->{PERL_INC}     = $self->catdir("$self->{PERL_ARCHLIB}","CORE"); # wild guess for now
+	# Check for environment override so we'll find the headers in the correct place
+        if (defined $ENV{PERL_INC})
+        {
+            $self->{PERL_INC} = $ENV{PERL_INC};
+        }
 	my $perl_h;
 
 	if (not -f ($perl_h = $self->catfile($self->{PERL_INC},"perl.h"))