See packagers-readme/README.TXT

Index: remotebox
--- remotebox.orig
+++ remotebox
@@ -9,11 +9,11 @@ use POSIX qw(ceil);
 use MIME::Base64;
 use Glib ('TRUE','FALSE');
 # *** PACKAGERS MAY WISH TO PATCH THIS LOCATION ***
-use lib "$Bin/share/remotebox";
+use lib "${PREFIX}/share/remotebox";
 # *************************************************
 use vboxService qw($endpoint $fault :all);
 # *** PACKAGERS MAY WISH TO PATCH THIS LOCATION ***
-our $sharedir = "$Bin/share/remotebox";
+our $sharedir = "${PREFIX}/share/remotebox";
 # *************************************************
 
 require 'vboxserializers.pl';