--- bin/authentication_milter.orig	Thu Sep 10 05:37:11 2015
+++ bin/authentication_milter	Wed Apr 27 15:57:09 2016
@@ -14,7 +14,7 @@ use Module::Load;
 use Pod::Usage;
 
 # CONFIG
-my $pid_file = '/run/authentication_milter.pid';
+my $pid_file = '${VARBASE}/run/authentication_milter.pid';
 my $daemon = 0;
 my $help   = 0;
 my $prefix;
@@ -145,7 +145,7 @@ __END__
 =item -p|--pidfile <file>
 
   Write the process PID to the given file.
-  defaults to /run/authentication_milter.pid
+  defaults to ${VARBASE}/run/authentication_milter.pid
 
 =item --prefix <dir>