--- Makefile.in.orig	2011-10-26 15:30:21.000000000 +0800
+++ Makefile.in	2011-11-20 17:27:39.085225614 +0800
@@ -431,7 +431,7 @@
 	$(MAKE) -f Makefile.perl
 
 install: Makefile.perl
-	$(MAKE) -f Makefile.perl install PREFIX=$(prefix)
+	$(MAKE) -f Makefile.perl pure_install PREFIX=$(prefix)
 
 Makefile.perl: Makefile.PL
 	srcdir=$(srcdir) builddir=$(abs_builddir) $(PERL) $< PREFIX=$(prefix) FIRST_MAKEFILE=Makefile.perl