use the proper perl path on debian systems.
http://bugs.debian.org/551746
http://bugs.debian.org/553092

Index: repository/configure.ac
===================================================================
--- repository.orig/configure.ac	2011-06-26 16:42:44.332540000 +1000
+++ repository/configure.ac	2011-06-26 16:42:51.265037638 +1000
@@ -357,17 +357,9 @@
 AC_DEFINE_DIR([SYSCONFDIR],[sysconfdir],[Expanded configuration directory])
 AC_SUBST(ZM_CONFIG,"$SYSCONFDIR/zm.conf")
 
-# Slight hack for non-standard perl install paths
-if test "$prefix" != "NONE"; then
-    PERL_SITE_PREFIX=`perl -V:siteprefix | sed -e "s/.*='\(.*\)';/\1/"`
-    PERL_SITE_LIB=`perl -V:installsitelib | sed -e "s/.*='\(.*\)';/\1/"`
-    PERL_LIB_PATH=`echo $PERL_SITE_LIB | sed -e "s|^$PERL_SITE_PREFIX||"`
-    EXTRA_PERL_LIB="use lib '$prefix$PERL_LIB_PATH'; # Include custom perl install path"
-    PERL_MM_PARMS="PREFIX=$prefix"
-else
-    EXTRA_PERL_LIB="# Include from system perl paths only"
-    PERL_MM_PARMS=
-fi
+EXTRA_PERL_LIB="# Include from system perl paths only"
+PERL_MM_PARMS="INSTALLDIRS=vendor"
+
 AC_SUBST(PERL_MM_PARMS)
 AC_SUBST(EXTRA_PERL_LIB)
 
